cicd: Run tests automatically

.forgejo/workflows/testing.yml

@@ -3,7 +3,25 @@ on:
     branches:
       - testing
 jobs:
+  test:
+    runs-on: docker
+    container:
+      image: ghcr.io/catthehacker/ubuntu:act-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache-dependency-path: '**/requirements.dev.txt'
+      - name: Install dependencies
+        working-directory: core
+        run: pip3 install -r requirements.dev.txt
+      - name: Run django tests
+        working-directory: core
+        run: python3 manage.py test
+
   deploy:
+    needs: [test]
     runs-on: docker
     steps:
       - uses: actions/checkout@v4