fix: update Docker workflow to include container image and remove obsolete test workflow

.gitea/workflows/docker-image-linux.yml

@@ -16,6 +16,9 @@ env:
 jobs:
   build-and-push:
     runs-on: ubuntu-latest
+    container:
+      image: gitea/runner-images:ubuntu-latest
+
     permissions:
       contents: read
       packages: write

.gitea/workflows/test.yml

@@ -1,22 +0,0 @@
-name: Run Actions
-run-name: ${{ gitea.actor }} compiles
-
-on:
-  push:
-    branches:
-      - dev
-      - main
-    tags:
-      - '*.*.*'
-  workflow_dispatch:
-
-jobs:
-  build-and-push-image:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-    steps:
-      - name: Dump Environment Variables
-        run: |
-          env | sort