pre-build docker image

Author: tillkruss

.github/workflows/image.yml

@@ -0,0 +1,44 @@
+name: Build Image
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - build/fpm.Dockerfile
+      - .github/workflows/image.yml
+  workflow_dispatch:
+
+jobs:
+
+  build:
+
+    name: Build and push image
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: build
+          file: build/fpm.Dockerfile
+          push: true
+          tags: ghcr.io/${{ github.repository_owner }}/fpm:latest

.github/workflows/package.yml

@@ -20,10 +20,10 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v6
 
-      - name: Build the Docker image
+      - name: Pull the Docker image
         run: |
-          cd build
-          docker build . --tag fpm --file fpm.Dockerfile
+          docker pull ghcr.io/${{ github.repository_owner }}/fpm:latest
+          docker tag ghcr.io/${{ github.repository_owner }}/fpm:latest fpm
 
       - name: Bundle packages
         run: |