enhancement : Moved Docker images repo to docker folder in main branch

[Helion55]

Reference Issues or PRs

Fixes #2871

What does this implement/fix?

• Other (please describe):

Moved docker-images repo back to main nebari's repo. Changes made,

1. Created folder named docker and moved the necessary files from docker repository.
2. Updated the .github/workflows folder by adding the build-push-docker.yaml and test-images.yaml files from docker repo's workflow folder.
3. Added documentation.yml and RFD.md files to .github/ISSUE_TEMPLATE folder.
4. Updated .pre-commit-config.yaml file.

Testing

• Did you add new tests?
  no

• Did you test the pull request locally?
  no

Any other comments?

no

[viniciusdc]

Hey @Helion55 thanks for opening this PR! we will have a look during the following days, in nebari we use pre-commit to lint the files and commit changes; its just a few typos, but if you want then to be self-fixed, you can pip install pre-commit and run pre-commit install that should then run in your next commit. For now, this is the line that currently needs changes:

error: `statis` should be `stasis`, `status`
  --> docker/scripts/install-conda-environment.sh:56:29