Set file permission during Docker copy action
The Dockerfile has been updated to set the file permission to 555 during the copy action for '/builddir/apg-go'. This change ensures that the appropriate user permissions are set right from when the image is built.
Project URLs have been changed in several files from "src.neessen.cloud/wneessen/apg-go" to "github.com/wneessen/apg-go". In addition, Dockerfile has been significantly refactored. It now includes steps for tidy and verify of Go modules and builds a statically linked binary. Several metadata files have been added with copyright information.
The Dockerfile has been streamlined to remove unnecessary steps and over-complications. Previously the setup involved building in a separate stage and copying files over, which has now been simplified to just copying the necessary executable to the scratch container and specifying the entry point.
The Docker build command in the GitHub workflow file (docker.yml) now requires sudo privileges. Additionally, the Dockerfile has been expanded to not only tidy up and verify the Go modules project but also to alter the build path for the "apg-go" executable.
The Docker image creation and pushing procedures have been moved from the goreleaser.yaml file to a separate GitHub Workflow file docker.yml. This shift gives a more granular control over the Docker image build and push operations with specific GitHub Actions. Also, added the Dockerfile instructions and docker-files for image building to cope up with the changed Docker process.
