fix(Dockerfile): Remove `VOLUME` in Dockerfile

Anonymous volumes are discouraged for reliable persistence.

Users should use named volumes or bind mounts instead. Potentially breaking change, users can also use explicit anonymous volumes instead of relying on implicit anonymous volumes.

`nginx-proxy` really should not be creating implicit anonymous volumes as in most cases it is undesirable.

`git blame` reveals this was added in 2014  by jwilder, with a message that implies implicit anonymous volumes was never intended..

Dockerfile

@@ -70,7 +70,5 @@ WORKDIR /app/
 
 ENV DOCKER_HOST unix:///tmp/docker.sock
 
-VOLUME ["/etc/nginx/certs"]
-
 ENTRYPOINT ["/app/docker-entrypoint.sh"]
 CMD ["forego", "start", "-r"]

Dockerfile.alpine

@@ -67,7 +67,5 @@ WORKDIR /app/
 
 ENV DOCKER_HOST unix:///tmp/docker.sock
 
-VOLUME ["/etc/nginx/certs"]
-
 ENTRYPOINT ["/app/docker-entrypoint.sh"]
 CMD ["forego", "start", "-r"]