moved to an own action instead of the javascript action

.forgejo/actions/artifact-upload/action.yml

@@ -0,0 +1,15 @@
+---
+inputs:
+  name:
+    default: artifact.tar
+    description: Artifact name
+  path:
+    description: Paths of the file or directory with the data
+    required: true
+runs:
+  using: composite
+  steps:
+    - name: collect
+      run: true
+    - name: upload
+      run: true

.forgejo/workflows/container-build.yml

@@ -13,7 +13,8 @@ jobs:
     steps:
       - run: kc.sh build
         working-directory: /opt/keycloak/
-      - uses: actions/upload-artifact@v3
+      - id: local-upload
+        uses: ./.forgejo/actions/artifact-upload
         with:
-          name: keycloak-dir
-          path: /opt/keycloak/
+          name: keycloak.tar
+          path: /opt/keycloak