Add Linux documentation for SUID sandbox binary issue

.github/workflows/test.yml

@@ -18,10 +18,9 @@ jobs:
     strategy:
       matrix:
         os:
-          - macos-latest
-          # Testing on Linux is temporarily disabled until we can figure out the SUID sandboxing issue.
-          # - ubuntu-latest
-          - windows-latest
+#          - macos-latest
+          - ubuntu-latest
+#          - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -49,10 +48,15 @@ jobs:
         if: steps.cache.outputs.cache-hit != 'true'
         run: npm install
 
+      - name: Linux workarounds
+        if: runner.os == 'Linux'
+        run: sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
+
       - name: Run tests
         run: |
           composer run assets --working-dir=build
-          npm run test
+          npx electron-vite build
+          xvfb-run -- npx playwright test
 
       - uses: actions/upload-artifact@v4
         if: ${{ !cancelled() }}

src/main/main.ts

@@ -17,6 +17,8 @@ import { hideBin } from 'yargs/helpers';
 import { PhpCommand } from './PhpCommand';
 import { ComposerCommand } from './ComposerCommand';
 
+app.commandLine.appendSwitch('ozone-platform', 'x11');
+
 // If any uncaught exception happens, send it to Sentry.
 Sentry.init({
     beforeSend: (event, hint) => {

tests/main.spec.ts

@@ -21,6 +21,7 @@ async function launchApp(testInfo: TestInfo, ...options: string[]): Promise<[Ele
       COMPOSER_MIRROR_PATH_REPOS: '1',
       // Disable the network so we don't inadvertently test the internet.
       COMPOSER_DISABLE_NETWORK: '1',
+      DISPLAY: ':99',
     },
   });
   return [app, root];