ci: Only start containers for testing

Signed-off-by: Julius Knorr <jus@bitgrid.net>

Author: juliusknorr

.github/workflows/docker.yml

@@ -98,6 +98,7 @@ jobs:
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache-new
       - name: Start containers with docker compose
+        if: matrix.container == 'php82' || matrix.container == 'php83' || matrix.container == 'php84'
         run: |
           ./bootstrap.sh
           PHP_VERSION=$(echo ${{ matrix.container }} | sed -e 's/^php//')