fix runner

.gitea/workflows/ci.yml

@@ -8,9 +8,17 @@ on:
 
 jobs:
   validate:
-    runs-on: ubuntu-latest
+    runs-on: docker
+
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          apt-get update
+          apt-get install -y python3 python3-pip docker.io
+          pip3 install ansible
 
       - name: Python syntax check
         run: |
@@ -22,10 +30,9 @@ jobs:
 
       - name: Ansible syntax check
         run: |
-          python3 -m pip install --user ansible
           ansible-playbook -i enterprise-infra-simulator/inventory/hosts.ini \
             --syntax-check enterprise-infra-simulator/playbooks/*.yml
 
       - name: Docker compose validation
         run: |
-          docker compose -f observability-stack/docker-compose.yml config
+          docker compose -f observability-stack/docker-compose.yml config