ci: add publish Docker workflow

[lvarin]

• Add maven
• Add jdk8
• Add Dockerhub profile
• Changing Dockerhub repository
• Add Dockerfile option

[codecov[bot]]

Codecov Report

Base: 55.19% // Head: 55.19% // No change to project coverage :thumbsup:

Coverage data is based on head (8cd285f) compared to base (1c28cff). Patch has no changes to coverable lines.

:exclamation: Current head 8cd285f differs from pull request most recent head c6f4619. Consider uploading reports for the commit c6f4619 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #45 +/- ## ======================================= Coverage 55.19% 55.19% ======================================= Files 64 64 Lines 2089 2089 Branches 223 223 ======================================= Hits 1153 1153 Misses 803 803 Partials 133 133 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=elixir-cloud-aai). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=elixir-cloud-aai)

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[lvarin]

All warnings seem to have disappeared.