init github workflow publish

Author: mattfors

.github/workflows/build.yml

@@ -27,6 +27,9 @@ jobs:
     - name: Build Angular project
       run: npm run build
 
+    - name: Authenticate to GitHub Packages registry
+      run: echo "//npm.pkg.github.com/:_authToken=${{ secrets.GITHUB_TOKEN }}" > ~/.npmrc
+
     - name: Publish to GitHub Packages
       env:
         NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}