Add docker-example workflow

Signed-off-by: Marc Dumais <[email protected]>

.github/workflows/docker-example.yml

@@ -0,0 +1,43 @@
+name: docker-example
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+
+  build-and-test:
+    name: Build image
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+    - uses: actions/checkout@v3
+
+    # - name: Build example-docker
+    #   run: |
+    #     cd examples/docker
+    #     docker build -t tte .
+
+    - name: Build example-docker
+      uses: nick-invision/retry@v3
+      with:
+        timeout_minutes: 5
+        retry_wait_seconds: 15
+        max_attempts: 3
+        retry_on: error
+        command: |
+          cd examples/docker
+          docker build -t tte .
+        on_retry_command: cd ../..
+
+    - name: run docker image
+      run: |
+        docker run --init -d -p 0.0.0.0:4000:4000 tte
+
+    - name: test
+      run: |
+        wget --tries=10 --wait=30 http://localhost:4000
+        cat index.html | grep "Theia-Trace Example Application"

examples/docker/example-package.json

@@ -37,7 +37,6 @@
     "@theia/cli": "1.45.1"
   },
   "scripts": {
-    "prepare": "theia build",
     "start": "theia start",
     "watch": "theia build --watch"
   },