Add git setup for alpine

.forgejo/workflows/build-image.yml

@@ -6,14 +6,12 @@ jobs:
     container:
       image: node:18-alpine
     steps:
-      - name: Repository Checkout
-        uses: https://gitea.angry.im/actions/checkout@v3
-        with:
-          submodules: recursive
+      - name: Install packages
+        run: |
+          apk add git podman
 
       - name: Setup podman
         run: |
-          apk add podman
           podman login gitea.angry.im --username PeterCxy --password ${{ secrets.FORGEJO_TOKEN }}
 
       - name: Fixup subuid/subgid
@@ -21,6 +19,11 @@ jobs:
           echo 'root:1:999' > /etc/subuid
           echo 'root:1:999' > /etc/subgid
 
+      - name: Repository Checkout
+        uses: https://gitea.angry.im/actions/checkout@v3
+        with:
+          submodules: recursive
+
       - name: Confirm Podman works
         run: podman run --rm hello-world