* feat: add docker-compose file
* refactor: lower docker-compose version
* feat(docker-compose): add help docs and image dir, fix lavalink
* fix(docker): missing ffmpeg dependency
* fix(docker): compile imagemagick with pango support
This fixes commands such as `meme` causing the bot to crash, since Alpine does not have a pango-enabled version of IM7 in its repos.
* feat(docker): cache npm dependencies
By copying just the `package-(lock).json` and installing dependencies, Docker will cache the deps on subsequent builds.
* fix(docker-compose): need to adjust connection addresses
The MongoDB and Chrome addresses are automatically passed through with the correct value. A separate `servers.json` file specifically for docker-compose is used with the correct container addresses.
Each container has a static ip - this is due to an unfortunate limitation of the Chrome remote debugger, which needs either an IP or `localhost`, and refuses connections to a hostname.
* refactor(docker): do not include servers.json for compose
Compose will use the normal `servers.json` and users will have to change the hostnames to `lavalink` and `api` respectively.
