Linux build with proton picker

.github/workflows/build.yml

@@ -2,11 +2,11 @@ name: Build check
 
 on:
   push:
-    branches: [main, master]
+    branches: [main, master, linux_build]
   pull_request:
 
 jobs:
-  build:
+  build-windows:
     runs-on: windows-latest
 
     steps:
@@ -32,3 +32,26 @@ jobs:
         run: npm run build
         env:
           ELECTRON_RUN_AS_NODE: ''
+
+  build-linux:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Node 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Build Linux AppImage
+        run: bash scripts/build.sh --deps
+
+      - name: Upload Linux binary
+        uses: actions/upload-artifact@v4
+        with:
+          name: OctoLauncher-linux
+          path: distprod/*.AppImage
+          if-no-files-found: error