import docker data to netdisco repo

docker/netdisco-backend/Dockerfile

@@ -0,0 +1,9 @@
+# vim: ft=Dockerfile
+FROM netdisco-base:latest
+
+RUN mkdir $NETDISCO_HOME/netdisco-mibs && cd $NETDISCO_HOME/netdisco-mibs && \
+  curl -s https://api.github.com/repos/netdisco/netdisco-mibs/tags | \
+  jq '.[]|.tarball_url|select(test("tarball/\\d+\\.\\d+$"))' | \
+  sort -rg | head -n1 | xargs -n1 curl -L | tar --strip-components=1 -zxf -
+
+CMD bash