feat: add nix-host and also transition to building both images with it

.github/workflows/build.yml

@@ -8,11 +8,15 @@ on:
 
 jobs:
   buildAndPush:
-    runs-on: [ nix ]
+    runs-on: [ nix-host ]
+    strategy:
+      fail-fast: false
+      matrix:
+        containers: ["nix", "nix-host"]
     steps:
     - uses: actions/checkout@v4
     - name: Nix build
-      run: nix build --extra-experimental-features "flakes nix-command" .
+      run: nix build --extra-experimental-features "flakes nix-command" .${{matrix.containers}}
     - name: Setup skopeo
       run: curl -o /etc/containers/policy.json --create-dirs https://raw.githubusercontent.com/containers/skopeo/refs/heads/main/default-policy.json
     - name: Push Image
@@ -22,9 +26,9 @@ jobs:
       env: 
         USERNAME: tamipes
         UPLOAD_TOKEN: ${{ secrets.UPLOAD_TOKEN }}
-        IMG_URL: git.tami.moe/tamipes/nix
+        IMG_URL: git.tami.moe/tamipes/${{matrix.containers}}
     - name: niks3 pin
       uses: https://git.tami.moe/actions/niks3-upload@main
       with:
         token: ${{ secrets.NIKS3_TOKEN }}
-        pin: nix-container
+        pin: containers.${{matrix.containers}}