add node-sass sample app and add integration test

tests/Oryx.Integration.Tests/NodeEndToEndTests.cs

@@ -646,6 +646,43 @@ await EndToEndTestHelper.BuildRunAndAssertAppAsync(
                 });
         }
 
+        [Theory]
+        [MemberData(nameof(TestValueGenerator.GetNodeVersions), MemberType = typeof(TestValueGenerator))]
+        public async Task Node_NodeSassExample(string nodeVersion)
+        {
+            // Arrange
+            var appName = "node-sass-example";
+            var hostDir = Path.Combine(_hostSamplesDir, "nodejs", appName);
+            var volume = DockerVolume.Create(hostDir);
+            var appDir = volume.ContainerDir;
+            var portMapping = $"{HostPort}:{ContainerPort}";
+            var script = new ShellScriptBuilder()
+                .AddCommand($"cd {appDir}")
+                .AddCommand($"oryx -appPath {appDir} -bindPort {ContainerPort}")
+                .AddCommand(DefaultStartupFilePath)
+                .ToString();
+
+            await EndToEndTestHelper.BuildRunAndAssertAppAsync(
+                appName,
+                _output,
+                volume,
+                "oryx",
+                new[] { "build", appDir, "-l", "nodejs", "--language-version", nodeVersion },
+                $"oryxdevms/node-{nodeVersion}",
+                portMapping,
+                "/bin/sh",
+                new[]
+                {
+                    "-c",
+                    script
+                },
+                async () =>
+                {
+                    var data = await _httpClient.GetStringAsync($"http://localhost:{HostPort}/");
+                    Assert.Contains("<title>Node-sass example</title>", data);
+                });
+        }
+
         [Fact]
         public async Task Node_CreateReactAppSample()
         {