Adding DevContainer support

[panoramix360]

As promised on issue #95, we added support for DevContainer from Microsoft on Visual Code.

We added some steps on README to help others running the project and marked as optional.

[wmnnd]

Very cool, thanks for building this! :clap:

I just gave it a try and I have a few thoughts:

• I needed to change the docker-compose file version to "2" to make it work on my machine. As far as I can see, it uses no features from 3.x
• It looks like the npm setup doesn’t quite work. When started the system for the first time, I needed to run npm i manually first, before it would work.
• The containers are all Debian-based and thus much larger than their Alpine counterparts. Changing this would probably require a fair bit of work, and I don’t know if it would be worth it. So I’d be happy to merge with the current setup :smiley:

[panoramix360]

Nice points @wmnnd, thank you for letting me know.

I'll look into it to discover why npm install was not runned and the other points about the docker-compose version and Alpine.

I'll let you know my conclusions :)

[panoramix360]

Hi @wmnnd, sorry for the delay in this change.

We are getting back from the holidays and will return our contributions here :D

[wmnnd]

No worries, I’m very happy you’re still motivated to help :partying_face:

[panoramix360]

@wmnnd we updated with what you suggested!

We included mix deps.get command on the postCreateCommand too, so after running devcontainer for the first time, the developer will only need to run mix phx.server :D

Please, let me known what you think

[wmnnd]

Looking great, thanks for this contribution, it’ll make it super easy for new people who want to contribute :heart: