Updated dockerfile to allow building without local repo, changed couchdb to have flexible hostname

[NewlineDotBlog]

Hi,

When I tried to install bbrf on my local server I ran into some issues installing it all through portainer. Despite cloning the entire repository to another location on my server, the set up would refuse to work. After some tinkering it seems the following two issues fixed in this pull request caused the issues.

For whatever reason, docker refuses to run docker-entrypoint.sh (due to permission issues) if it is mapped as volume in the docker compose file. After some tinkering, it seems that replacing the COPY commands in the dockerfile to ADD commands which simply retrieve the files from the github repo seems to work just fine.

Secondly, allowing to change the hostname of couchdb helps in situations where there are several other instances of couchdb running in the same network. Since the hostname was hardcoded in the bbrf-init.sh file, I updated this to instead use a new local environment variable COUCHDB_HOSTNAME instead. This seems to work and allow the server to start without a local repo. (save for a few locally copied config files)

Apologies if this is a bad PR, there is a first time for everything. If you'd like to see things changed let me know.

[honoki]

Hi @NewlineDotBlog - thanks for this PR. I like the changes that remove the requirements for a local repo and would like to merge those in.

I'm not so sure about the hostname variable; as it stands it seems like a user would need to edit the hostname in 3 places still: the service hostname, the COUCHDB_HOSTNAME variable, and the depends_on. For that reason, it doesn't seem easier than manually changing them. If you can find a way to combine those all together, I would welcome that change, otherwise can you please make a new PR that only incorporates the dockerfile changes?