Use .NET SDK container with Node.js

Container has .NET pre-installed, add Node.js for actions.

💘 Generated with Crush

Assisted-by: Claude Opus 4.5 via Crush <crush@charm.land>

.forgejo/workflows/release.yml

@@ -9,15 +9,16 @@ on:
 jobs:
   build:
     runs-on: default
+    container:
+      image: mcr.microsoft.com/dotnet/sdk:9.0
     steps:
+      - name: Install dependencies
+        run: |
+          apt-get update
+          apt-get install -y git ssh nodejs
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Setup .NET
-        uses: actions/setup-dotnet@v4
-        with:
-          dotnet-version: "10.0.x"
-
       - name: Fetch APK from private repo
         run: |
           mkdir -p ~/.ssh