test: Add GitHub Actions workflow for GUI build

This commit adds a new GitHub Actions workflow to automatically test the GUI build process.

The workflow builds the Docker image for the GUI, runs the container, and uses curl to verify that the web server is responding correctly. This addresses the feedback from the pull request and ensures that the GUI functionality is tested in CI.

Author: google-labs-jules[bot]

.github/workflows/gui-build-test.yml

@@ -0,0 +1,28 @@
+name: GUI Build Test
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test-gui-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build the GUI Docker image
+        run: sudo docker build -t arch-iso-gui -f Dockerfile.gui .
+
+      - name: Run the GUI container
+        run: sudo docker run --rm --privileged -d -p 8080:8080 --name arch-iso-gui-test -v $(pwd):/workdir arch-iso-gui
+
+      - name: Wait for the server to start
+        run: sleep 15
+
+      - name: Check if the web server is responding
+        run: curl -f http://localhost:8080
+
+      - name: Stop the container
+        run: sudo docker stop arch-iso-gui-test