Run composer install before building docker

Author: Phencys

.github/workflows/deploy_beta.yml

@@ -18,6 +18,10 @@ jobs:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN  }}
+      - name: Composer install
+        run: |
+          cd jccp
+          composer install
       - name: Build and push
         uses: docker/build-push-action@v2
         with: