reuse qgis image for lrelease

.github/workflows/release.yml

@@ -23,9 +23,6 @@ jobs:
           curl -OL https://github.com/transifex/cli/releases/download/v1.6.5/tx-linux-amd64.tar.gz
           tar -xvzf tx-linux-amd64.tar.gz
 
-      - name: Install Qt lrelease
-        run: sudo apt-get update && sudo apt-get install qtbase5-dev qttools5-dev-tools
-
       - name: Set version
         run: echo ${{ github.event.release.tag_name }} > CURRENT_VERSION.txt
 
@@ -46,7 +43,7 @@ jobs:
       - name: translate project
         run: |
           ./tx pull -a
-          ./project/scripts/project-translation-compile.sh project
+          docker compose run qgis sh -c 'xvfb-run /usr/src/project/scripts/project-translation-compile.sh /usr/src/project'
           rm project/signalo_*.ts  # do not package ts files
 
       - name: set project version + create project archive