diff --git a/.dockerignore b/.dockerignore
index 7451c5a..8125ff6 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -2,7 +2,6 @@
 
 !docker/coturn/alpine/
 !docker/coturn/debian/
-!docker/coturn/rootfs/
 
 !cmake/
 !CMakeLists.txt
diff --git a/.gitignore b/.gitignore
index afd7bd3..e97aac6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-Makefile
+/Makefile
 /bin/
 build
 include
@@ -32,7 +32,7 @@ tags
 .DS_Store
 .directory
 *.debug
-Makefile*
+/Makefile*
 *.prl
 *.app
 moc_*.cpp
diff --git a/docker/coturn/.gitignore b/docker/coturn/.gitignore
new file mode 100644
index 0000000..7f90abb
--- /dev/null
+++ b/docker/coturn/.gitignore
@@ -0,0 +1,4 @@
+/node_modules/
+/package-lock.json
+/yarn.lock
+/yarn-error.log
diff --git a/docker/coturn/Makefile b/docker/coturn/Makefile
new file mode 100644
index 0000000..45b12d8
--- /dev/null
+++ b/docker/coturn/Makefile
@@ -0,0 +1,52 @@
+####################
+# Testing commands #
+####################
+
+# Run Bats tests for Docker image.
+#
+# Documentation of Bats:
+#	https://github.com/bats-core/bats-core
+#
+# Usage:
+#	make test.docker [tag=($(VERSION)|<tag>)]
+
+test.docker:
+ifeq ($(wildcard node_modules/.bin/bats),)
+	@make npm.install
+endif
+	DOCKERFILE=$(DOCKERFILE) \
+	IMAGE=coturn-debian \
+	node_modules/.bin/bats \
+		--timing $(if $(call eq,$(CI),),--pretty,--formatter tap) \
+		tests/main.bats
+
+
+
+
+################
+# NPM commands #
+################
+
+# Resolve project NPM dependencies.
+#
+# Usage:
+#	make npm.install [dockerized=(no|yes)]
+
+npm.install:
+ifeq ($(dockerized),yes)
+	docker run --rm --network=host -v "$(PWD)":/app/ -w /app/ \
+		node \
+			make npm.install dockerized=no
+else
+	npm install
+endif
+
+
+
+
+##################
+# .PHONY section #
+##################
+
+.PHONY: npm.install \
+        test.docker
\ No newline at end of file
diff --git a/docker/coturn/alpine/Dockerfile b/docker/coturn/alpine/Dockerfile
index f570a20..5ccbc82 100644
--- a/docker/coturn/alpine/Dockerfile
+++ b/docker/coturn/alpine/Dockerfile
@@ -3,7 +3,6 @@
 #
 
 ARG alpine_ver=3.13
-ARG coturn_git_ref=-
 
 
 
@@ -15,13 +14,15 @@ ARG coturn_git_ref=-
 # https://hub.docker.com/_/alpine
 FROM alpine:${alpine_ver} AS dist-coturn
 
+ARG coturn_git_ref=HEAD
+
 # Install tools for building.
 RUN apk update \
- && apk add --no-cache --virtual .tool-deps \
+ && apk add --no-cache \
         autoconf coreutils g++ git libtool make
 
 # Install Coturn build dependencies.
-RUN apk add --no-cache --virtual .build-deps \
+RUN apk add --no-cache \
         linux-headers \
         libevent-dev \
         openssl-dev \
@@ -46,7 +47,7 @@ COPY turndb/ /app/turndb/
 WORKDIR /app/
 
 # Use Coturn sources from Git if `coturn_git_ref` is specified.
-RUN if [ ! "${coturn_git_ref}" = '-' ]; then true \
+RUN if [ "${coturn_git_ref}" != 'HEAD' ]; then true \
  && rm -rf /app/* \
  && git init \
  && git remote add origin https://github.com/coturn/coturn \
@@ -77,11 +78,12 @@ RUN mkdir -p /out/ \
  && rm -f /out/etc/coturn/turnserver.conf.default
 
 # Install helper tools of Docker image.
-COPY docker/coturn/rootfs/ /out/
+COPY docker/coturn/alpine/rootfs/ /out/
 RUN chmod +x /out/usr/local/bin/docker-entrypoint.sh \
-             /out/usr/local/bin/detect-external-ip.sh \
- && ln -s /usr/local/bin/detect-external-ip.sh \
+             /out/usr/local/bin/detect-external-ip.sh
+RUN ln -s /usr/local/bin/detect-external-ip.sh \
           /out/usr/local/bin/detect-external-ip
+RUN chown -R nobody:nogroup /out/var/lib/coturn/
 
 
 
@@ -93,6 +95,8 @@ RUN chmod +x /out/usr/local/bin/docker-entrypoint.sh \
 # https://hub.docker.com/_/alpine
 FROM alpine:${alpine_ver} AS runtime
 
+LABEL org.opencontainers.image.source="https://github.com/coturn/coturn"
+
 # Update system packages.
 RUN apk update \
  && apk upgrade \
@@ -115,8 +119,11 @@ COPY --from=dist-coturn /out/ /
 RUN apk add --no-cache libcap \
  && setcap CAP_NET_BIND_SERVICE=+ep /usr/bin/turnserver \
  # Cleanup unnecessary stuff.
+ && apk del libcap \
  && rm -rf /var/cache/apk/*
 
+USER nobody:nogroup
+
 EXPOSE 3478 3478/udp
 
 VOLUME ["/var/lib/coturn"]
diff --git a/docker/coturn/rootfs/usr/local/bin/detect-external-ip.sh b/docker/coturn/alpine/rootfs/usr/local/bin/detect-external-ip.sh
similarity index 100%
rename from docker/coturn/rootfs/usr/local/bin/detect-external-ip.sh
rename to docker/coturn/alpine/rootfs/usr/local/bin/detect-external-ip.sh
diff --git a/docker/coturn/rootfs/usr/local/bin/docker-entrypoint.sh b/docker/coturn/alpine/rootfs/usr/local/bin/docker-entrypoint.sh
similarity index 100%
rename from docker/coturn/rootfs/usr/local/bin/docker-entrypoint.sh
rename to docker/coturn/alpine/rootfs/usr/local/bin/docker-entrypoint.sh
diff --git a/docker/coturn/debian/Dockerfile b/docker/coturn/debian/Dockerfile
new file mode 100644
index 0000000..4841160
--- /dev/null
+++ b/docker/coturn/debian/Dockerfile
@@ -0,0 +1,138 @@
+#
+# Dockerfile of coturn/coturn:debian Docker image.
+#
+
+ARG debian_ver=buster
+
+
+
+
+#
+# Stage 'dist-coturn' creates Coturn distribution.
+#
+
+# https://hub.docker.com/_/debian
+FROM debian:${debian_ver}-slim AS dist-coturn
+
+ARG coturn_git_ref=HEAD
+
+# Install tools for building.
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends --no-install-suggests \
+            autoconf coreutils g++ git libtool make pkg-config
+
+# Install Coturn build dependencies.
+RUN apt-get install -y --no-install-recommends --no-install-suggests \
+            libevent-dev \
+            libssl-dev \
+            libpq-dev libmariadb-dev libsqlite3-dev \
+            libhiredis-dev \
+            libmongoc-dev
+
+# Prepare local Coturn sources for building.
+COPY CMakeLists.txt \
+     configure \
+     INSTALL \
+     LICENSE LICENSE.OpenSSL \
+     make-man.sh Makefile.in \
+     postinstall.txt \
+     README.turn* \
+     /app/
+COPY cmake/ /app/cmake/
+COPY examples/ /app/examples/
+COPY man/ /app/man/
+COPY src/ /app/src/
+COPY turndb/ /app/turndb/
+WORKDIR /app/
+
+# Use Coturn sources from Git if `coturn_git_ref` is specified.
+RUN if [ "${coturn_git_ref}" != 'HEAD' ]; then true \
+ && rm -rf /app/* \
+ && git init \
+ && git remote add origin https://github.com/coturn/coturn \
+ && git pull origin "${coturn_git_ref}" \
+ && true; fi
+
+
+# Build Coturn from sources.
+RUN ./configure --prefix=/usr \
+                --turndbdir=/var/lib/coturn \
+                --disable-rpath \
+                --sysconfdir=/etc/coturn \
+                # No documentation included to keep image size smaller.
+                --mandir=/tmp/coturn/man \
+                --docsdir=/tmp/coturn/docs \
+                --examplesdir=/tmp/coturn/examples \
+ && make
+
+# Install and configure Coturn.
+RUN mkdir -p /out/ \
+ && DESTDIR=/out make install \
+ # Remove redundant files.
+ && rm -rf /out/tmp/ \
+ # Preserve license file.
+ && mkdir -p /out/usr/share/licenses/coturn/ \
+ && cp LICENSE /out/usr/share/licenses/coturn/ \
+ # Remove default config file.
+ && rm -f /out/etc/coturn/turnserver.conf.default
+
+# Install helper tools of Docker image.
+COPY docker/coturn/debian/rootfs/ /out/
+RUN chmod +x /out/usr/local/bin/docker-entrypoint.sh \
+             /out/usr/local/bin/detect-external-ip.sh
+RUN ln -s /usr/local/bin/detect-external-ip.sh \
+          /out/usr/local/bin/detect-external-ip
+RUN chown -R nobody:nogroup /out/var/lib/coturn/
+
+
+
+
+#
+# Stage 'runtime' creates final Docker image to use in runtime.
+#
+
+# https://hub.docker.com/_/debian
+FROM debian:${debian_ver}-slim AS runtime
+
+LABEL org.opencontainers.image.source="https://github.com/coturn/coturn"
+
+# Update system packages.
+RUN apt-get update \
+ && apt-get upgrade -y \
+ && apt-get install -y --no-install-recommends --no-install-suggests \
+            ca-certificates \
+ && update-ca-certificates \
+ # Install Coturn dependencies.
+ && apt-get install -y --no-install-recommends --no-install-suggests \
+            libevent-2.1-6 libevent-core-2.1-6 libevent-extra-2.1-6 \
+            libevent-openssl-2.1-6 libevent-pthreads-2.1-6 \
+            libssl1.1 \
+            libpq5 libmariadb3 libsqlite3-0 \
+            libhiredis0.14 \
+            libmongoc-1.0-0 \
+ # Cleanup unnecessary stuff.
+ && rm -rf /var/lib/apt/lists/*
+
+# Install Coturn distribution.
+COPY --from=dist-coturn /out/ /
+
+# Allow non-root using privileged ports.
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends --no-install-suggests \
+            libcap2-bin \
+ && setcap CAP_NET_BIND_SERVICE=+ep /usr/bin/turnserver \
+ # Cleanup unnecessary stuff.
+ && apt-get purge -y --auto-remove \
+                  -o APT::AutoRemove::RecommendsImportant=false \
+            libcap2-bin \
+ && rm -rf /var/lib/apt/lists/*
+
+USER nobody:nogroup
+
+EXPOSE 3478 3478/udp
+
+VOLUME ["/var/lib/coturn"]
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+CMD ["--log-file=stdout", "--external-ip=$(detect-external-ip)"]
diff --git a/docker/coturn/debian/rootfs/usr/local/bin/detect-external-ip.sh b/docker/coturn/debian/rootfs/usr/local/bin/detect-external-ip.sh
new file mode 100644
index 0000000..b4e4c57
--- /dev/null
+++ b/docker/coturn/debian/rootfs/usr/local/bin/detect-external-ip.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ -z "$REAL_EXTERNAL_IP" ]; then
+  export REAL_EXTERNAL_IP="$(curl -4 https://icanhazip.com 2>/dev/null)"
+fi
+
+exec echo "$REAL_EXTERNAL_IP"
diff --git a/docker/coturn/debian/rootfs/usr/local/bin/docker-entrypoint.sh b/docker/coturn/debian/rootfs/usr/local/bin/docker-entrypoint.sh
new file mode 100644
index 0000000..27d6086
--- /dev/null
+++ b/docker/coturn/debian/rootfs/usr/local/bin/docker-entrypoint.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# If command starts with an option, prepend it with a `turnserver` binary.
+if [ "${1:0:1}" == '-' ]; then
+  set -- turnserver "$@"
+fi
+
+exec $(eval "echo $@")
diff --git a/docker/coturn/old.Dockerfile b/docker/coturn/old.Dockerfile
deleted file mode 100644
index adac700..0000000
--- a/docker/coturn/old.Dockerfile
+++ /dev/null
@@ -1,154 +0,0 @@
-### 1. stage: create mongoc image
-FROM debian:stable-slim AS mongoc-build
-
-ENV MONGO_LIB_VERSION 1.17.4
-
-# Install build dependencies
-RUN export DEBIAN_FRONTEND=noninteractive && \
-	apt-get update && \
-	apt-get install -y build-essential git python cmake
-RUN apt-get install -y libssl-dev
-RUN git clone https://github.com/mongodb/mongo-c-driver.git && \
-    cd mongo-c-driver && \
-    git checkout ${MONGO_LIB_VERSION} && \
-    python build/calc_release_version.py > VERSION_CURRENT  && \
-    mkdir -p cmake-build/install && \
-    cd cmake-build && \
-    cmake -DENABLE_AUTOMATIC_INIT_AND_CLEANUP=OFF -DCMAKE_BUILD_TYPE=Release .. && \
-    DESTDIR=/mongo-c-driver/cmake-build/install cmake --build . --target install
-
-RUN cd /mongo-c-driver/cmake-build/install && tar -cf /mongoc.tar .
-
-### 2. stage: create build image
-FROM debian:stable-slim AS coturn-build
-
-ENV BUILD_PREFIX /usr/local/src
-
-# Install build dependencies
-RUN export DEBIAN_FRONTEND=noninteractive && \
-	apt-get update && \
-	apt-get install -y build-essential git debhelper dpkg-dev pkg-config libssl-dev libevent-dev sqlite3 libsqlite3-dev postgresql-client libpq-dev default-mysql-client default-libmysqlclient-dev libhiredis-dev libsystemd-dev
-
-COPY --from=mongoc-build /mongoc.tar /tmp
-RUN tar -xf /tmp/mongoc.tar -C /
-
-# Clone Coturn
-WORKDIR ${BUILD_PREFIX}
-RUN git clone https://github.com/coturn/coturn.git
-
-# Build Coturn
-WORKDIR ${BUILD_PREFIX}/coturn
-RUN ./configure
-RUN make
-
-### 3. stage: create production image
-
-FROM debian:stable-slim AS production
-
-ENV INSTALL_PREFIX /usr/local
-ENV BUILD_PREFIX /usr/local/src
-ENV TURNSERVER_GROUP turnserver
-ENV TURNSERVER_USER turnserver
-
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/bin/ ${INSTALL_PREFIX}/bin/
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/man/ ${INSTALL_PREFIX}/man/
-#COPY turnserver.conf ${INSTALL_PREFIX}/etc
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/sqlite/turndb ${INSTALL_PREFIX}/var/db/turndb
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/turndb ${INSTALL_PREFIX}/turndb
-
-COPY --from=mongoc-build /mongoc.tar /tmp
-RUN tar -xf /tmp/mongoc.tar -C / && rm /tmp/mongoc.tar
-
-# Install lib dependencies
-RUN export DEBIAN_FRONTEND=noninteractive && \
-	apt-get update && \
-	apt-get install -y libc6 libsasl2-2 libevent-2.1 libevent-core-2.1-6 libevent-extra-2.1-6 libevent-openssl-2.1-6 libevent-pthreads-2.1-6 libhiredis0.14 libmariadbclient-dev libpq5 libsqlite3-0 libssl1.1 && \
-	apt-get clean && rm -f /var/lib/apt/lists/*_*
-
-RUN if ! getent group "$TURNSERVER_GROUP" >/dev/null; then \
-        addgroup --system "$TURNSERVER_GROUP" || exit 1 ;\
-    fi \
-    && \
-    if ! getent passwd "$TURNSERVER_USER" >/dev/null; then \
-        adduser --system \
-           --home / \
-           --shell /bin/false \
-           --no-create-home \
-           --ingroup "$TURNSERVER_GROUP" \
-           --disabled-password \
-           --disabled-login \
-           --gecos "turnserver daemon" \
-               "$TURNSERVER_USER" || exit 1; \
-    fi
-
-WORKDIR ${INSTALL_PREFIX}
-CMD ${INSTALL_PREFIX}/bin/turnserver
-
-
-### 4. stage: create testing
-
-FROM debian:stable-slim as coturn
-
-ENV INSTALL_PREFIX /usr/local
-ENV BUILD_PREFIX /usr/local/src
-ENV TURNSERVER_GROUP turnserver
-ENV TURNSERVER_USER turnserver
-
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/bin/ ${INSTALL_PREFIX}/bin/
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/man/ ${INSTALL_PREFIX}/man/
-#COPY turnserver.conf ${INSTALL_PREFIX}/etc
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/sqlite/turndb ${INSTALL_PREFIX}/var/db/turndb
-COPY --from=coturn-build ${BUILD_PREFIX}/coturn/turndb ${INSTALL_PREFIX}/turndb
-
-COPY --from=mongoc-build /mongoc.tar /tmp
-RUN tar -xf /tmp/mongoc.tar -C / && rm /tmp/mongoc.tar
-
-# Install lib dependencies
-RUN export DEBIAN_FRONTEND=noninteractive && \
-	apt-get update && \
-	apt-get install -y libc6 libsasl2-2 libevent-2.1 libevent-core-2.1-6 libevent-extra-2.1-6 libevent-openssl-2.1-6 libevent-pthreads-2.1-6 libhiredis0.14 libmariadbclient-dev libpq5 libsqlite3-0 libssl1.1
-RUN apt-get install -y default-mysql-client postgresql-client redis-tools
-
-# Workaround for MongoDB
-RUN ln -s /bin/echo /bin/systemctl
-
-# Install MongoDB
-RUN apt-get update && \
-  apt-get install -y wget gnupg && \
-  wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | apt-key add - && \
-  echo "deb http://repo.mongodb.org/apt/debian stretch/mongodb-org/4.4 main" | tee /etc/apt/sources.list.d/mongodb-org-4.4.list && \
-  echo "deb http://deb.debian.org/debian/ stretch main" | tee /etc/apt/sources.list.d/debian-stretch.list && \
-  apt-get update && \
-  apt-get install -y libcurl3 mongodb-org mongodb-org-server mongodb-org
-
-RUN if ! getent group "$TURNSERVER_GROUP" >/dev/null; then \
-        addgroup --system "$TURNSERVER_GROUP" || exit 1 ;\
-    fi \
-    && \
-    if ! getent passwd "$TURNSERVER_USER" >/dev/null; then \
-        adduser --system \
-           --home / \
-           --shell /bin/false \
-           --no-create-home \
-           --ingroup "$TURNSERVER_GROUP" \
-           --disabled-password \
-           --disabled-login \
-           --gecos "turnserver daemon" \
-               "$TURNSERVER_USER" || exit 1; \
-    fi
-
-
-# set startup parameters
-# SUTN/TURN PORTS
-EXPOSE 3478 3479 3478/udp 3479/udp 80 80/udp
-EXPOSE 5349 5350 5349/udp 5350/udp 443 443/udp
-# CLI
-EXPOSE 5766
-# Relay Ports
-EXPOSE 49152-65535 49152-65535/udp
-
-#COPY ./docker-entrypoint.sh /
-#ENTRYPOINT ["/docker-entrypoint.sh"]
-
-WORKDIR ${INSTALL_PREFIX}
-CMD ${INSTALL_PREFIX}/bin/turnserver
\ No newline at end of file
diff --git a/docker/coturn/package.json b/docker/coturn/package.json
new file mode 100644
index 0000000..84e240a
--- /dev/null
+++ b/docker/coturn/package.json
@@ -0,0 +1,5 @@
+{
+  "devDependencies": {
+    "bats": "^1.1"
+  }
+}
diff --git a/docker/coturn/tests/main.bats b/docker/coturn/tests/main.bats
index e2836b0..682c6a6 100644
--- a/docker/coturn/tests/main.bats
+++ b/docker/coturn/tests/main.bats
@@ -11,54 +11,38 @@
   [ "$status" -eq 0 ]
 }
 
-@test "Coturn has correct version" {
-  run sh -c "grep 'ARG coturn_ver=' Dockerfile | cut -d '=' -f2"
-  [ "$status" -eq 0 ]
-  [ ! "$output" = '' ]
-  expected="$output"
-
-  run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'Version Coturn' | cut -d ' ' -f2 \
-                                           | cut -d '-' -f2"
-  [ "$status" -eq 0 ]
-  [ ! "$output" = '' ]
-  actual="$output"
-
-  [ "$actual" = "$expected" ]
-}
-
 
 @test "TLS supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'TLS supported'"
+    "turnserver -o --log-file=stdout | grep 'TLS supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "DTLS supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'DTLS supported'"
+    "turnserver -o --log-file=stdout | grep 'DTLS supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "DTLS 1.2 supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'DTLS 1.2 supported'"
+    "turnserver -o --log-file=stdout | grep 'DTLS 1.2 supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "TURN/STUN ALPN supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'TURN/STUN ALPN supported'"
+    "turnserver -o --log-file=stdout | grep 'TURN/STUN ALPN supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "oAuth supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep '(oAuth) supported'"
+    "turnserver -o --log-file=stdout | grep '(oAuth) supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
@@ -66,35 +50,35 @@
 
 @test "SQLite supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'SQLite supported'"
+    "turnserver -o --log-file=stdout | grep 'SQLite supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "Redis supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'Redis supported'"
+    "turnserver -o --log-file=stdout | grep 'Redis supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "PostgreSQL supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'PostgreSQL supported'"
+    "turnserver -o --log-file=stdout | grep 'PostgreSQL supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "MySQL supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'MySQL supported'"
+    "turnserver -o --log-file=stdout | grep 'MySQL supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }
 
 @test "MongoDB supported" {
   run docker run --rm --entrypoint sh $IMAGE -c \
-    "turnserver -o | grep 'MongoDB supported'"
+    "turnserver -o --log-file=stdout | grep 'MongoDB supported'"
   [ "$status" -eq 0 ]
   [ ! "$output" = '' ]
 }