Fix code generation, debugging and icons in docker image

[sgraband]

Move settings to package.json Add gdb to docker image Ignore already downloaded plugins for docker build

[sgraband]

Added a commit that:

• Only keeps tje k8s.dockerfile -> renames it to Dockerfile
• Removes the outdated dockerfiles folder
• Adds a yarn script for building the docker image

And added a follow up for the tree-view comparison: #489