Add Docker installation

[jacobkiers]

As a convenience to easily run and deploy XHGui, I'd like this docker support to be merged.

[markstory]

Should the application container be running mongodb? Normally I would run mongo in a separate container/standalone service.

Having it embedded in the application container makes it harder to have persistent data.

[jacobkiers]

Persistent storage is already possible, in two specific ways:

• One can update the config/config.default.php file with the correct mongo address. This keeps the in-container mongo instance running, but does not use it.
• One can run with the in-container mongo instance, but use a docker volume for that: docker run -v $(pwd)/mongo-data:/data/db).

Would it suffice if I add a README.md file in the docker/ folder specifying these options?

[markstory]

Yes you could do those things, but you will not be able to restart or manage the in-container mongo at all though, and when not in use it will burn a non-zero amount of resources.

Is there a reason to not use docker-compose? It sets the user up for success better in the future.

[jacobkiers]

Hi, just quick note to assure you that I haven't forgotten about this. I'm currently unable to work on it, but I expect to be able to address the comments within a month.

[markstory]

@jacobkiers I've not forgotten either. I'm the midst of a bunch of work for some of my other projects, and hope to circle back on this after that is complete.

[glensc]

this looked stale, and I wanted to use official images with multi containers, so I created:

• Add docker-compose setup #263

first I tried to add my commits on top of this branch, but as there remained no common changes, rebased with only my commits.