Docker Compose for dev and prod

[jeroenvandermeulen]

Description

This PR adds opendora and backstage to the docker compose. Together with a Dockerfile for Backstage and environment variables in the .env for other services. Currently there is still some work to do to also be able to develop in Docker

Issue

This PR addresses issue #136 .

Contribution Checklist:

• [x] The pull request only addresses one issue or adds one feature.
• [x] The pull request does not introduce any breaking changes
• [ ] I have added screenshots or gifs to help explain the change if applicable.
• [x] I have read the contribution guidelines.
• [ ] I have ran the linting and formatting scripts to make sure the code is consistently styled.
• [ ] I have built/compiled and ran the tests to make sure the code works correctly.
• [ ] I have added or changed tests to cover new or different functionality, where applicable.
• [x] Create an issue and link to the pull request.

Note: Keeping the PR small and focused helps make it easier to review and merge. If you have multiple changes you want to make, please consider submitting them as separate pull requests.

[jeroenvandermeulen]

Yeah so I'm not quite sure about the backstage-opendora part because it puts a complete backstage application into our repo. For now it's just the easiest way to see if everything works but I want to make it so that we don't need to add the whole backstage app for people to run the docker compose. Possibly will need to generate and gitignore something with a script or within the Dockerfile to make that work