Support for ghcr.io container registry.

[gaby]

Docker improvements:

• Added .dockerignore file made for Python projects.
• Cleanup of Dockerfile
• Upgrade pip before trying to install any dependency.

Improvements to Github Workflows:

• Added support for building, tagging and pushing an image to ghcr.io
• Added support for running Docker Builds for Pull Requests.
• Any pushes to master/main will get tagged as "latest".
• Support for semver tags.
• Image will be tagged as: ghcr.io/minitriga/Netbox-Device-Type-Library-Import
• Docker Image will Only be pushed when a new tag is created or when changes are committed into master/main branch.

TODO:

• @minitriga Will need to follow the instructions from ( https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#authenticating-to-the-container-registry ) to create a Github Token for the image to be pushed.

[gaby]

@minitriga Friendly bump

[minitriga]

Thank you @gaby i have merged it and the actions run fine.

[gaby]

Thanks! :-)