Enable multi-arch docker builds via flowzone

Change-type: patch
Signed-off-by: Kyle Harding <[email protected]>

.github/workflows/flowzone.yml

@@ -3,19 +3,25 @@ name: Flowzone
 on:
   pull_request:
     types: [opened, synchronize, closed]
-    branches:
-      - "main"
-      - "master"
+    branches: [main, master]
+  # allow external contributions to use secrets within trusted code
+  pull_request_target:
+    types: [opened, synchronize, closed]
+    branches: [main, master]
 
 jobs:
   flowzone:
     name: Flowzone
     uses: product-os/flowzone/.github/workflows/flowzone.yml@master
-    secrets:
-      FLOWZONE_TOKEN: ${{ secrets.FLOWZONE_TOKEN }}
-      GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
-      GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
-      DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
-      DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
+    # prevent duplicate workflow executions for pull_request and pull_request_target
+    if: |
+      (
+        github.event.pull_request.head.repo.full_name == github.repository &&
+        github.event_name == 'pull_request'
+      ) || (
+        github.event.pull_request.head.repo.full_name != github.repository &&
+        github.event_name == 'pull_request_target'
+      )
+    secrets: inherit
     with:
       docker_images: balena/open-balena-db

docker-bake.hcl

@@ -0,0 +1,6 @@
+target "default" {
+  platforms = [
+    "linux/amd64",
+    "linux/arm64"
+  ]
+}