Switch to debian and setup buildah

.forgejo/workflows/build.yaml

@@ -5,29 +5,30 @@ env:
 
 jobs:
   build:
-    runs-on: alpine
+    runs-on: debian
     steps:
       -
-        name: Install dependencies
-        shell: sh
+        name: Install and configure dependencies
         run: |
-          apk add bash buildah git
+          apt-get install -y --no-install-recommends buildah containers-storage git
+          sed /usr/share/containers/storage.conf \
+            -e '/^#\?mount_program/c\
+          mount_program = "/usr/bin/fuse-overlayfs"' \
+            -e '/^additionalimagestores/a\
+            "/var/lib/shared/"' \
+          > /etc/containers/storage.conf
       -
         name: Checkout repository
-        shell: sh
         run: |
           git config --global credential.helper store
           echo "https://runner:${{ secrets.GITHUB_TOKEN }}@$(echo "${{ github.server_url }}" | cut -b 9-)" > ~/.git-credentials
           git clone --branch ${{ github.ref_name }} ${{ github.server_url }}/${{ github.repository }} ${{ github.workspace }}
       -
         name: Authenticate with registry
-        shell: sh
         run: |
           echo "${{ secrets.REGISTRY_TOKEN }}" | buildah login ${{ env.REGISTRY }} --username runner --password-stdin
       -
         name: Build and push
-        shell: sh
         run: |
-          id
           ${{ github.workspace }}/builder.sh ${{ env.REGISTRY_IMAGE }}
           buildah push ${{ env.REGISTRY_IMAGE }}