[FIX] docker workaround: use bsdtar instead of tar due to overlayfs bug

cf. docker/hub-feedback#727

Dockerfile

@@ -14,6 +14,7 @@ RUN apt-get update && apt-get install -y \
     mysql-client default-libmysqlclient-dev \
     postgresql-client libpq-dev \
     sqlite3 \
+    bsdtar \
   --no-install-recommends && rm -rf /var/lib/apt/lists/*
 
 # Installing node / npm in Debian (following official nodejs Dockerfile https://github.com/nodejs/docker-node):
@@ -31,7 +32,7 @@ RUN curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-
   && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
   && gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc \
   && grep " node-v$NODE_VERSION-linux-x64.tar.xz\$" SHASUMS256.txt | sha256sum -c - \
-  && tar -xJf "node-v$NODE_VERSION-linux-x64.tar.xz" -C /usr/local --strip-components=1 \
+  && bsdtar -xJf "node-v$NODE_VERSION-linux-x64.tar.xz" -C /usr/local --strip-components=1 \
   && rm "node-v$NODE_VERSION-linux-x64.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
   && ln -s /usr/local/bin/node /usr/local/bin/nodejs