added docker build

[codeprefect]

Description

Fixes the issue about docker images not generating on new releases.

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] Improvements (non-breaking runtime improvements)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Testing Instructions

Recreating any of the existing tags should trigger a Github Action workflow that would generate new artefacts and push the necessary Docker images.

See here for artefacts from the workflow on my fork.

@arnaudroques, it is important to configure the necessary docker configurations as secrets.

DOCKERHUB_USERNAME: plantuml-server
DOCKERHUB_TOKEN: obtain from DockerHub

Checklist

• [x] I have performed a self-review of my own code
• [x] I have commented on my code, particularly in hard-to-understand areas
• [x] My changes generate no new warnings or errors
• [ ] I have added test instructions that prove my fix is effective or that my feature works

[Fixes #184]

[stevehipwell]

@mimam419 how come you're not filtering tags to match the v* pattern? @arnaudroques could you remove and recreate the last 3 tags so we can get binaries and Docker images?

[arnaudroques]

@mimam419 Sorry for the delay, just created DOCKERHUB_USERNAME and DOCKERHUB_TOKEN as secret in github. Tell me if there are still some stuff to do. Thanks again!

[stevehipwell]

@arnaudroques is your username (DOCKERHUB_USERNAME) plantuml?

[arnaudroques]

@arnaudroques is your username (DOCKERHUB_USERNAME) plantuml?

Yes, it is now. Initial value was wrongly setted.

I think I have to create a new tag to trigger the GitHub action.

[stevehipwell]

Have you tested a docker login locally with the token?

[arnaudroques]

@mimam419 Many thanks for your work. I have recreated tag v1.2021.10 and something has been pushed to Docker Hub.

[stevehipwell]

@arnaudroques I can confirm that you have a published Docker image and I'm just about to test it.