Rollback Dockerfile to version @ 2.5.x (#5122)

Fixes https://github.com/prometheus/prometheus/issues/5043

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

Dockerfile

@@ -7,13 +7,16 @@ COPY documentation/examples/prometheus.yml  /etc/prometheus/prometheus.yml
 COPY console_libraries/                     /usr/share/prometheus/console_libraries/
 COPY consoles/                              /usr/share/prometheus/consoles/
 
-RUN ln -s /usr/share/prometheus/console_libraries /usr/share/prometheus/consoles/ /etc/prometheus/ && \
-    mkdir -p /prometheus && \
-    chown -R nobody:nogroup etc/prometheus /prometheus && \
-    ln -s /prometheus /etc/prometheus/data
+RUN ln -s /usr/share/prometheus/console_libraries /usr/share/prometheus/consoles/ /etc/prometheus/
+RUN mkdir -p /prometheus && \
+    chown -R nobody:nogroup etc/prometheus /prometheus
 
 USER       nobody
 EXPOSE     9090
 VOLUME     [ "/prometheus" ]
-WORKDIR    /etc/prometheus
+WORKDIR    /prometheus
 ENTRYPOINT [ "/bin/prometheus" ]
+CMD        [ "--config.file=/etc/prometheus/prometheus.yml", \
+             "--storage.tsdb.path=/prometheus", \
+             "--web.console.libraries=/usr/share/prometheus/console_libraries", \
+             "--web.console.templates=/usr/share/prometheus/consoles" ]