add ping to container

.gitea/workflows/tests.yaml

@@ -78,7 +78,7 @@ jobs:
       # - name: wait for postgres
       #   run: sleep 60
       - name: Check postgres reachability
-        run: ping -c 200 db
+        run: apt update && apt install -y iputils-ping && ping -c 200 db
       - name: postgres service check
         run: PGPASSWORD=${{ secrets.DB_PASS }} psql -u ${{ secrets.DB_USER }} -D ${{ secrets.DB_NAME }} -h ${{ secrets.DB_HOST }} "SELECT * FROM vods;"