Fix Git repo permissions during CI (#52)

* WIP: debug

* WIP: test

* WIP: test 2

* WIP: run on any push

* WIP: Use newer version of checkout action to avoid `safe.directory` error

* WIP: Pin exact version

* Move registry to env var

* Revert "WIP: Pin exact version"

This reverts commit 846e64d.

* Revert "WIP: Use newer version of checkout action to avoid `safe.directory` error"

This reverts commit 36f1e66.

* WIP: Fix repo ownership

.github/workflows/build.yaml

@@ -2,14 +2,9 @@ name: Build firmwares
 
 on:
   push:
-    paths:
-      - Dockerfile
-      - .github/workflows/build.yaml
-      - manifests/**/*.yaml
-    branches:
-      - main
-    tags:
-      - '*'
+
+env:
+  REGISTRY: ghcr.io
 
 jobs:
   build-container:
@@ -23,7 +18,7 @@ jobs:
         id: create-container-name
         run: |
           repository_owner=$(echo $GITHUB_REPOSITORY_OWNER | tr [:upper:] [:lower:])
-          image_name="ghcr.io/$repository_owner/silabs-firmware-builder"
+          image_name="${{ env.REGISTRY }}/$repository_owner/silabs-firmware-builder"
           tag_name="${{ hashFiles('Dockerfile') }}"
 
           echo "image_name=$image_name" >> $GITHUB_OUTPUT
@@ -32,7 +27,7 @@ jobs:
       - name: Log in to the GitHub container registry
         uses: docker/[email protected]
         with:
-          registry: ghcr.io
+          registry: ${{ env.REGISTRY }}
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Set up Docker Buildx
@@ -103,6 +98,9 @@ jobs:
 
       - name: Build firmware
         run: |
+          # Fix `fatal: detected dubious ownership in repository at`
+          git config --global --add safe.directory "$GITHUB_WORKSPACE"
+
           # Pass all SDKs as consecutive `--sdk ...` arguments
           sdk_args=""
           for sdk_dir in /gecko_sdk*; do