add arm docker build

.github/workflows/ci.yml

@@ -3,9 +3,6 @@ on:
   push:
     branches: [main]
 
-permissions:
-  packages: write
-
 jobs:
   build:
     name: Build

.github/workflows/tip.yaml

@@ -6,7 +6,7 @@ permissions:
   packages: write
 
 jobs:
-  docker-build:
+  docker-build-x86:
     name: Build docker image
     runs-on: ubuntu-latest
     steps:
@@ -26,3 +26,25 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Docker push
         run: nix develop --command skopeo copy "docker-archive:result" "docker://ghcr.io/connet-dev/connet:latest"
+
+  docker-build-arm:
+    name: Build docker image
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v27
+        with:
+          extra_nix_config: system = aarch64-linux
+          nix_path: nixpkgs=channel:nixos-unstable
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Docker build
+        run: nix build .#docker
+      - name: Docker login
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Docker push
+        run: nix develop --command skopeo copy "docker-archive:result" "docker://ghcr.io/connet-dev/connet:latest"