Add Github Actions build

[gliptak]

https://github.com/gliptak/docker-lambda/pull/1/checks?check_run_id=1166239653

[gliptak]

@mhart please review

[mhart]

Can you elaborate?

[gliptak]

After this PR is merged, the build can be updated to build all Dockerfiles in the project ensuring that build process is successful (running on all PRs and master commits)

[mhart]

There's already a build script to build all the images, you can use that if you like: https://github.com/lambci/docker-lambda/blob/master/base/build-all.sh

[gliptak]

@mhart running https://github.com/lambci/docker-lambda/blob/master/base/build-all.sh runs out-of-space https://github.com/gliptak/docker-lambda/runs/1171597286?check_suite_focus=true

[mhart]

Yeah, there are 40 images now – I guess GH Actions can't do this out of the box

[gliptak]

Separating into two builds works https://github.com/gliptak/docker-lambda/pull/1/checks?check_run_id=1172828830 https://github.com/gliptak/docker-lambda/pull/1/checks?check_run_id=1172828834

[gliptak]

Runs are green https://github.com/gliptak/docker-lambda/pull/1/checks?check_run_id=1173396166 https://github.com/gliptak/docker-lambda/pull/1/checks?check_run_id=1173396168

[gliptak]

@mhart any other updates you would need to see?

[mhart]

All good, thanks @gliptak !