Fix GitLab deploy port conflicts on Sinbad2.

Parametrize compose published ports and add CI safeguards to detect and release occupied frontend/backend ports before docker compose up, preventing bind errors on 8075.

.gitlab-ci.yml

@@ -25,6 +25,21 @@ deploy_to_sinbad2:
     - echo "Levantando contenedores con Docker Compose..."
     - ssh $REMOTE_USER@$SSH_HOST "
         cd ~/deploy_$APP_NAME &&
+        echo 'Comprobando puertos en uso...' &&
+        docker ps --format '{{.ID}} {{.Ports}}' | grep -E '0.0.0.0:$FRONTEND_PORT->|0.0.0.0:$BACKEND_PORT->' || true &&
+        CONFLICT_FRONT=\$(docker ps -q --filter publish=$FRONTEND_PORT) &&
+        if [ ! -z \"\$CONFLICT_FRONT\" ]; then
+          echo \"Liberando puerto frontend $FRONTEND_PORT (contenedores: \$CONFLICT_FRONT)\" &&
+          docker stop \$CONFLICT_FRONT &&
+          docker rm \$CONFLICT_FRONT;
+        fi &&
+        CONFLICT_BACK=\$(docker ps -q --filter publish=$BACKEND_PORT) &&
+        if [ ! -z \"\$CONFLICT_BACK\" ]; then
+          echo \"Liberando puerto backend $BACKEND_PORT (contenedores: \$CONFLICT_BACK)\" &&
+          docker stop \$CONFLICT_BACK &&
+          docker rm \$CONFLICT_BACK;
+        fi &&
+        export BACKEND_PORT=$BACKEND_PORT FRONTEND_PORT=$FRONTEND_PORT ALLOWED_ORIGINS=\"http://sinbad2.ujaen.es,http://sinbad2.ujaen.es:$FRONTEND_PORT\" &&
         docker compose down --remove-orphans &&
         docker compose build --no-cache frontend backend &&
         docker compose up -d