Updating github-config

Add linux/amd64 and linux/arm64 targets to package.toml for multi-arc…

…h support

Add package.toml file with no targets (backward compatibility test)

Enable multi-arch

for real this time (i hope)

hopefully last thing

Update all references to dockerhub repo name

Fix dockerhub image uri from duplicating registry hostname

Use relative path for package.toml from tmp_dir

Test latest changes