fix multi-arch builds

.github/workflows/docker_publish.yml

@@ -30,13 +30,6 @@ jobs:
       # This is used to complete the identity challenge
       # with sigstore/fulcio when running outside of PRs.
       id-token: write
-    strategy:
-      matrix:
-        include:
-          - dockerfile: Dockerfile
-            platform: linux/amd64
-          - dockerfile: arm.Dockerfile
-            platform: linux/arm64/v8
 
     steps:
       - name: Checkout repository
@@ -69,15 +62,25 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern=v{{major}}
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
         id: build-and-push
         uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825
         with:
           context: .
-          file: docker/${{ matrix.dockerfile }}
+          file: docker/Dockerfile
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: ${{ matrix.platform }}
+          platforms:
+            - linux/amd64
+            - linux/arm64
+            - linux/arm/v6
+            - linux/arm/v7

README.md

@@ -19,9 +19,7 @@ https://flashpaper.io
   4. Set up a reverse-proxy in front of FlashPaper that terminates SSL/TLS
 
 #### Building an Image
-  You can build your own image using the provided Dockerfile in the `docker/` folder. There are currently two:
-  - For x86_64 (`docker/Dockerfile`)
-  - For ARM64 (`docker/arm.Dockerfile`)
+  You can build your own image using the provided Dockerfile in the `docker/` folder.
 
   In order to build FlashPaper, run `docker build . -t flashpaper -f docker/Dockerfile`. If you would like to build FlashPaper for a different CPU architecture, replace `docker/Dockerfile` with the appropriate Dockerfile.
   You can also build via docker-compose by replacing the `image:` line in [docker-compose.yml](https://github.com/AndrewPaglusch/FlashPaper/blob/master/docker-compose.yml) with the following (make sure to choose the Dockerfile for your architecture):