move common parts to netdisco-base

docker/netdisco-backend/Dockerfile

@@ -5,9 +5,6 @@ FROM docker.io/netdisco/netdisco:${TAG}-base
 LABEL org.netdisco.maintainer="The Netdisco Project"
 LABEL org.netdisco.version=${TAG}
 
-VOLUME ["/home/netdisco/environments", "/home/netdisco/nd-site-local"]
-
-USER netdisco:netdisco
 WORKDIR $NETDISCO_HOME/netdisco-mibs
 RUN curl -s https://api.github.com/repos/netdisco/netdisco-mibs/tags | \
   jq '.[]|.tarball_url|select(test("tarball/\\d+\\.\\d+$"))' | \

docker/netdisco-base/Dockerfile

@@ -39,4 +39,7 @@ RUN mkdir $NETDISCO_HOME/bin && \
 ENV PATH $NETDISCO_HOME/bin:$PATH
 ENV SHELL "/bin/bash"
 
+VOLUME ["/home/netdisco/environments", "/home/netdisco/nd-site-local"]
+USER netdisco:netdisco
+WORKDIR $NETDISCO_HOME
 CMD ["bash"]

docker/netdisco-do/Dockerfile

@@ -5,9 +5,5 @@ FROM docker.io/netdisco/netdisco:${TAG}-base
 LABEL org.netdisco.maintainer="The Netdisco Project"
 LABEL org.netdisco.version=${TAG}
 
-VOLUME ["/home/netdisco/environments", "/home/netdisco/nd-site-local"]
-
-USER netdisco:netdisco
-WORKDIR $NETDISCO_HOME
 ENTRYPOINT ["/home/netdisco/bin/netdisco-do"]
 CMD [""]

docker/netdisco-web/Dockerfile

@@ -6,9 +6,5 @@ LABEL org.netdisco.maintainer="The Netdisco Project"
 LABEL org.netdisco.version=${TAG}
 
 EXPOSE 5000
-VOLUME ["/home/netdisco/environments", "/home/netdisco/nd-site-local"]
-
-USER netdisco:netdisco
-WORKDIR $NETDISCO_HOME
 ENTRYPOINT ["/home/netdisco/bin/netdisco-web"]
 CMD ["foreground"]