feat: add composer init to prebuild

.gitpod.yml

@@ -2,7 +2,12 @@ tasks:
   - init: docker-compose pull &&
       docker-compose build
     command: |
-      docker-compose up -d
+      docker-compose up -d      
+  - init: docker-compose pull &&docker run --rm --interactive --tty \
+      --volume $PWD:/app \
+      composer update --ignore-platform-reqs \
+      --optimize-autoloader --no-plugins --no-scripts --prefer-dist
+
 ports:
   - port: 8080
     onOpen: ignore