Publish semantic docker image

[robrix]

Per @tclem’s post:

We do also publish docker images internally - that should get ported over along with project CI.

[dcreager]

I can take this one, I've got the keys to the existing Docker hub account

[tclem]

Publishing is a manual process, but we've got a docker image now:

docker pull docker.pkg.github.com/github/semantic/semantic

[ChrisPenner]

Is the docker image published publicly anywhere? It'd be handy for folks to use :)

$ docker pull docker.pkg.github.com/github/semantic/semantic
Using default tag: latest
Error response from daemon: Get https://docker.pkg.github.com/v2/github/semantic/semantic/manifests/latest: no basic auth credentials

[tclem]

@ChrisPenner you'll need to authenticate (docker login) to access docker packages hosted on github.com - check out the docs here.