Default API IP to all interfaces in the docker image

Otherwise, the API isn't accessible even when ports are forwarded
without manually requesting `--api-ip`

An entrypoint wrapper is used so that only the default behavior is changed,
but `--api-ip` can still be passed to the command.

Dockerfile

@@ -8,4 +8,4 @@ RUN npm install -g
 
 USER nobody
 
-ENTRYPOINT ["configurable-http-proxy"]
+ENTRYPOINT ["/srv/configurable-http-proxy/chp-docker-entrypoint"]

chp-docker-entrypoint

@@ -0,0 +1,12 @@
+#!/bin/bash
+# Wrapper around CHP entrypoint that changes defaults slightly
+# to be more appropriate when run in a container.
+
+if [[ "$@" != *"--api-ip"* ]]; then
+  # Default api-ip to all interfaces in docker,
+  # so that it is accessible to other containers
+  # and when port-forwarding is requested.
+  ARGS="--api-ip=0.0.0.0"
+fi
+
+exec configurable-http-proxy $ARGS $@