Add local registry for sharing between buildx jobs

Author: jb3

.github/workflows/build.yaml

@@ -12,6 +12,11 @@ jobs:
   build:
     name: Build snekbox-integration image
     runs-on: ubuntu-latest
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000:5000
     outputs:
       artifact: ${{ env.artifact }}
       version: ${{ steps.version.outputs.version }}
@@ -38,6 +43,8 @@ jobs:
       # the builds. See https://github.com/docker/build-push-action
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          driver-opts: network=host
 
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@v3
@@ -78,15 +85,15 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          push: false
+          push: true
           target: venv
           build-args: DEV=1
           cache-from: |
             ${{ steps.cache_config.outputs.cache_from }}
             ghcr.io/python-discord/snekbox-base:latest
             ghcr.io/python-discord/snekbox-venv:latest
           cache-to: ${{ steps.cache_config.outputs.cache_to }}
-          tags: snekbox-venv:${{ steps.version.outputs.version }}
+          tags: localhost:5000/local/snekbox-venv:${{ steps.version.outputs.version }}
 
       - name: Build integration image for testing
         uses: docker/build-push-action@v6
@@ -96,9 +103,7 @@ jobs:
           push: false
           pull: false
           outputs: type=docker,dest=${{ env.artifact }}.tar
-          build-args: SNEKBOX_IMAGE=snekbox-venv
-          build-contexts: |
-            snekbox-venv=docker-image://snekbox-venv:${{ steps.version.outputs.version }}
+          build-args: SNEKBOX_IMAGE=localhost:5000/local/snekbox-venv:${{ steps.version.outputs.version }}
           cache-from: |
             ${{ steps.cache_config.outputs.cache_from }}
             ghcr.io/python-discord/snekbox-venv:latest