Use separately build pretix base image

Author: marcoacierno

.github/workflows/build-pretix.yml

@@ -20,30 +20,11 @@ jobs:
           aws-access-key-id: ${{ secrets.aws_access_key_id }}
           aws-secret-access-key: ${{ secrets.aws_secret_access_key }}
           aws-region: eu-central-1
-      - uses: actions/checkout@v4
-        with:
-          repository: pretix/pretix
-          ref: v2024.10.0
-          path: ./pretix-clone
       - name: Login to Amazon ECR
         uses: aws-actions/amazon-ecr-login@v2
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v3
-      - name: Build pretix base
-        uses: docker/build-push-action@v6
-        id: build-pretix-base
-        with:
-          context: ./pretix-clone
-          file: ./pretix-clone/Dockerfile
-          builder: ${{ steps.buildx.outputs.name }}
-          provenance: false
-          push: true
-          tags: |
-            ${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.eu-central-1.amazonaws.com/pythonit/pretix:pretix-base-${{ inputs.githash }}
-          cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache
-          platforms: linux/arm64
       - name: Build and push pretix
         uses: docker/build-push-action@v6
         with:
@@ -52,10 +33,7 @@ jobs:
           builder: ${{ steps.buildx.outputs.name }}
           provenance: false
           push: true
-          tags: |
-            ${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.eu-central-1.amazonaws.com/pythonit/pretix:arm-${{ inputs.githash }}
+          tags: ${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.eu-central-1.amazonaws.com/pythonit/pretix:arm-${{ inputs.githash }}
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache
           platforms: linux/arm64
-          build-args: |
-            PRETIX_IMAGE=${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.eu-central-1.amazonaws.com/pythonit/pretix:pretix-base-${{ inputs.githash }}

pretix/Dockerfile

@@ -1,6 +1,4 @@
-# v2024.10.0
-ARG PRETIX_IMAGE
-FROM ${PRETIX_IMAGE}
+FROM ghcr.io/pythonitalia/pycon/arm-pretix:v2024.10.0
 
 COPY ./settings.py /pretix/src/production_settings.py