Rename the tutorial and example template packages' package.json.template files to package.json on disk.
To comply with ng_package limitations (which forbids floating package.json files in package output), we added a copy_file rule in the BUILD files to generate the .template files during build/packaging, and excluded the source package.json files from the filegroups. This keeps package.json as standard files in the source tree while preserving docs packaging and runtime logic.