feat: try matrix docker action

.github/workflows/docker.yml

@@ -6,9 +6,14 @@ on:
   workflow_dispatch:
 
 jobs:
-  push-amd64:
-    name: 'push (amd64)'
-    runs-on: ubuntu-24.04
+  push:
+    strategy:
+      matrix:
+        os: [ubuntu-24.04, ubuntu-24.04-arm]
+        arch: [amd64, arm64]
+
+    name: push
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
 
@@ -27,46 +32,17 @@ jobs:
       - uses: docker/build-push-action@v6
         with:
           push: true
-          platforms: linux/amd64
+          platforms: linux/${{ matrix.arch }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
           provenance: false
           tags: |
-            ghcr.io/diced/zipline:v4-amd64
-            ghcr.io/diced/zipline:v4-${{ steps.sha.outputs.short_sha }}-amd64
-
-  push-arm64:
-    name: 'push (arm64)'
-    runs-on: ubuntu-24.04-arm
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Get commit sha
-        id: sha
-        run: |
-          echo "short_sha=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
-
-      - uses: docker/setup-buildx-action@v3
-      - uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - uses: docker/build-push-action@v6
-        with:
-          push: true
-          platforms: linux/arm64
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          provenance: false
-          tags: |
-            ghcr.io/diced/zipline:v4-arm64
-            ghcr.io/diced/zipline:v4-${{ steps.sha.outputs.short_sha }}-arm64
+            ghcr.io/diced/zipline:v4-${{ matrix.arch }}
+            ghcr.io/diced/zipline:v4-${{ steps.sha.outputs.short_sha }}-${{ matrix.arch }}
 
   ammend-builds:
     runs-on: ubuntu-24.04
-    needs: [push-amd64, push-arm64]
+    needs: push
     steps:
       - uses: actions/checkout@v4
       - name: Get commit sha