ci: add docker build and publish action

[HarshCasper]

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[HarshCasper]

Successful build (commenting out the Docker login part): https://github.com/localstack/localstack-docker-extension/actions/runs/3279662903/jobs/5399495411

[whummer]

@HarshCasper do you want to move the contents of LocalStack folder into the top level, as we discussed yesterday? /cc @Pive01

[HarshCasper]

@HarshCasper do you want to move the contents of LocalStack folder into the top level, as we discussed yesterday? /cc @Pive01

I believe yes. @Pive01 if you wish to push in any further commits of your work, please do so. I will move the contents of LocalStack dir in top level soon after 👍

[Pive01]

@HarshCasper do you want to move the contents of LocalStack folder into the top level, as we discussed yesterday? /cc @Pive01

I believe yes. @Pive01 if you wish to push in any further commits of your work, please do so. I will move the contents of LocalStack dir in top level soon after +1

Actually, I just made a PR where I did that ( #4 ), I also mentioned a couple of things still pending before officially presenting the extension like the persistence part (it seems that localstorage is not persistent after all) that needs to be solved @HarshCasper

[whummer]

Configured the Docker credentials in the build environment - will merge the PR, to test the Docker push. 👍

As a next step, we can reconfigure the pipeline to only push the Docker image for builds on main branch. /cc @HarshCasper