ci: add manual ARM64 branch image workflow

.github/workflows/coolify-branch-arm64.yml

@@ -0,0 +1,58 @@
+name: Build Coolify ARM64 Branch Image
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  prepare:
+    runs-on: ubuntu-24.04
+    outputs:
+      image_tag: ${{ steps.image.outputs.image_tag }}
+      version: ${{ steps.image.outputs.version }}
+    steps:
+      - name: Resolve image tag
+        id: image
+        env:
+          BRANCH_NAME: ${{ github.ref_name }}
+        run: |
+          IMAGE_TAG=$(echo "${BRANCH_NAME}" | tr '[:upper:]/_' '[:lower:]--' | sed -E 's/[^a-z0-9.-]+/-/g; s/^[.-]+//; s/[.-]+$//')
+          if [ -z "${IMAGE_TAG}" ]; then
+            echo "Could not create an image tag from branch: ${BRANCH_NAME}"
+            exit 1
+          fi
+
+          SHORT_SHA="${GITHUB_SHA::7}"
+          echo "image_tag=${IMAGE_TAG}" >> "${GITHUB_OUTPUT}"
+          echo "version=${IMAGE_TAG}.${SHORT_SHA}" >> "${GITHUB_OUTPUT}"
+
+  build:
+    needs: prepare
+    runs-on: ubuntu-24.04-arm
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push ARM64 image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: docker/production/Dockerfile
+          platforms: linux/arm64
+          push: true
+          build-args: |
+            COOLIFY_VERSION=${{ needs.prepare.outputs.version }}
+          tags: ghcr.io/coollabsio/coolify:${{ needs.prepare.outputs.image_tag }}