Migrate Docker image from tum-gis/3dcitydb-web-map-docker

[BWibo]

@thomashkolbe @clausnagel @Son-HNguyen

This PR migrates the Docker image for the Webclient from tum-gis/3dcitydb-web-map-docker to this repo.
Moreover, it add a build workflow for building edge and release version images and deploying them to ghcr.io and DockerHub. All image are built for amd64 and arm64 arch.

A test image is available here:
https://github.com/3dcitydb/3dcitydb-web-map/pkgs/container/3dcitydb-web-map-client

Please try out the new image and let me know if you come accross any issues.
@benediktschwab Thx for testing the arm64 build.

ToDos

• Migrate Docker image form tum-gis/3dcitydb-web-map-docker, see Migrate to official web map client repo tum-gis/3dcitydb-web-map-docker#7
  • Migrate Dockerfile
  • Update README.md with Docker content form tum-gis/3dcitydb-web-map-docker
• Add build workflows
  • Multi arch support (amd64, arm64)
  • edge image workflow
  • release image workflow
• Reduce image size
  • Drop examples (link to examples?)
  • Offer alpine and debian based versions, or is only alpine fine? --> debian-slim base image size is fine.
• Update server.js to use got instead of deprecated request library
• Update html Docker image landing page
• Archive tum-gis/3dcitydb-web-map-docker repo
• After merging this to master, we need to create a release (v2.0.1) to trigger the build workflows and have a first release version published
• Update documentation on ReadTheDocs, if necessary
• Update CHANGES.md

[BWibo]

Hey @Son-HNguyen,

some questions came up:

• There is the folder ts and tsconfig.json in the repo. Do I need to run a ts build before I put together the data in the image for the express server?
• What about build.xml is that file still up-to-date and being used?

[Son-HNguyen]

@BWibo The TypeScript files should only be built if they have been changed. Otherwise, the built JavaScript files are already stored.

The build.xml is not being used.