👷 Working on getting the nightly build running successfully

Signed-off-by: Marcus Fihlon <marcus@fihlon.swiss>

.github/workflows/docker-nightly.yml

@@ -41,7 +41,7 @@ jobs:
             echo "defined=false" >> $GITHUB_OUTPUT;
           fi
 
-  docker:
+  build-publish:
     if: needs.check-build.outputs.last-build-sha != github.sha && needs.check-secrets.outputs.defined == 'true'
     runs-on: ubuntu-latest
     name: Build and push Docker image
@@ -51,6 +51,12 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@v4
 
+      - name: Install Java 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+
       - name: Build with Maven
         run: ./mvnw clean package -Pproduction -e