Build PHAR in subdir and with specific files only

Author: coenjacobs

.github/workflows/release.yml

@@ -20,7 +20,12 @@ jobs:
       - name: Create .phar
         run: |
           wget -O phar-composer.phar https://github.com/clue/phar-composer/releases/download/v1.2.0/phar-composer-1.2.0.phar
-          php phar-composer.phar build .
+          mkdir build
+          mv vendor build/vendor
+          mv src build/src
+          mv bin build/bin
+          mv composer.json build
+          php -d phar.readonly=off phar-composer.phar build ./build/
 
       - name: Test run mozart
         run: php mozart.phar --version