Build example in CI

.github/workflows/ci.yml

@@ -45,3 +45,22 @@ jobs:
 
     - name: Run unit tests
       run:  go test ./...
+
+  ci-build-example:
+    name: ci-build-example
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v4
+
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v5
+      with:
+        go-version: ${{ env.GO_VERSION }}
+      id: go
+
+    - name: Build example
+      run:  go build -o mermaid-example ./example/main.go
+
+    - name: Run example
+      run: ./mermaid-example