CI: install curl and gh on Alpine runner (monitor health check needs curl, PR tests need gh)

.gitea/workflows/ci.yaml

@@ -5,7 +5,7 @@ jobs:
     runs-on: host
     steps:
       - name: install python
-        run: apk add --no-cache python3 py3-pip ca-certificates git 2>&1 | tail -3; python3 --version; git --version
+        run: apk add --no-cache python3 py3-pip ca-certificates git curl github-cli 2>&1 | tail -3; python3 --version; git --version
       - name: clone repo
         run: |
           rm -rf src