Add non-arm docker image build

.gitea/workflows/test-build.yml

@@ -24,6 +24,32 @@ jobs:
       - name: Check codebase
         run: nix flake check -L
 
+
+  docker-build:
+    needs: nix-flake-check
+    runs-on: debian-latest
+    steps:
+      - name: Install prerequisites
+        run: apt update && apt install -y sudo
+      - name: Install Nix
+        uses: https://github.com/cachix/install-nix-action@v22
+        with:
+          extra_nix_config: "experimental-features = nix-command flakes"
+          nix_path: nixpkgs=channel:nixos-23.05
+      - name: Remove access_tokens
+        run: sed -i '/^access-tokens/d' /etc/nix/nix.conf
+      - name: Check out repository
+        uses: https://github.com/RouxAntoine/checkout@v3.5.4
+        with:
+          ref: trunk
+      - name: Build image
+        run: nix build .#docker
+      - name: Push image with Skopeo
+        run: |
+          nix-env -i skopeo -f '<nixpkgs>'
+          wget https://raw.githubusercontent.com/containers/skopeo/main/default-policy.json && mkdir /etc/containers && mv default-policy.json /etc/containers/policy.json
+          skopeo copy docker-archive:result docker://icr.gmem.ca/dref:latest
+
   arm-docker-build:
     needs: nix-flake-check
     runs-on: debian-latest-arm