Added linux/arm/v7 to build platforms (#123)

Author: alexjustesen

.github/workflows/publish-image.yml

@@ -18,7 +18,7 @@ on:
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: ${{ github.repository }}
-  PLATFORMS: linux/amd64,linux/arm64
+  PLATFORMS: linux/amd64,linux/arm64,linux/arm/v7
 
 jobs:
   build-and-push-image: