Add Deno Oak in Zip example (awslabs#139)

Author: bnusunny

README.md

@@ -114,6 +114,7 @@ Lambda Web Adapter forwards this information to the web applicatioin in a Http H
 - [Rust Axum in Zip](examples/rust-axum-zip)
 - [Golang Gin](examples/gin)
 - [Golang Gin in Zip](examples/gin-zip)
+- [Deno Oak in Zip](examples/deno-zip)
 
 ## Acknowledgement
 

examples/deno-zip/README.md

@@ -0,0 +1,43 @@
+# deno-zip
+
+This example shows how to deploy a Deno app on Lambda with SnapStart enabled.
+
+The Deno app is compiled to a single binary using `deno compile`, packaged into Zip file and deployed to Lambda with Web Adapter.
+
+We use `java11` runtime to get SnapStart support with one caveat: no runtime hooks.
+
+```yaml
+  DenoFunction:
+    Type: AWS::Serverless::Function 
+    Properties:
+      CodeUri: src
+      Handler: app
+      Runtime: java11
+      AutoPublishAlias: live
+      SnapStart:
+        ApplyOn: PublishedVersions
+      Architectures:
+        - x86_64
+      Layers:
+        - !Sub arn:aws:lambda:${AWS::Region}:753240598075:layer:LambdaAdapterLayerX86:11
+      MemorySize: 512
+      Environment:
+        Variables:
+          AWS_LAMBDA_EXEC_WRAPPER: /opt/bootstrap
+          DENO_DIR: /tmp
+          PORT: 8000
+      Events:
+        HelloWorld:
+          Type: HttpApi
+    Metadata:
+      BuildMethod: makefile
+```
+
+## build and deploy
+
+Make sure Deno is already installed. Run the following commands on a x86_64 machine. 
+
+```shell
+sam build 
+sam deploy -g
+```

examples/deno-zip/src/Makefile

@@ -0,0 +1,3 @@
+build-DenoFunction:
+	deno compile -A -o $(ARTIFACTS_DIR)/app main.ts
+	

examples/deno-zip/src/main.ts

@@ -0,0 +1,16 @@
+import { Application, Router } from "https://deno.land/x/oak/mod.ts";
+
+const app = new Application();
+const router = new Router();
+const port = +(Deno.env.get("PORT") || "8080")
+
+router.get("/", (context) => {
+    context.response.body = {
+        success: true,
+        msg: "Hello World",
+    };
+});
+
+app.use(router.routes());
+
+await app.listen({ port });

examples/deno-zip/template.yaml

@@ -0,0 +1,49 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Transform: AWS::Serverless-2016-10-31
+Description: >
+  deno-zip
+
+  Sample SAM Template for deno-zip
+
+# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
+Globals:
+  Function:
+    Timeout: 10
+    MemorySize: 128
+
+Resources:
+  DenoFunction:
+    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
+    Properties:
+      CodeUri: src
+      Handler: app
+      Runtime: java11
+      AutoPublishAlias: live
+      SnapStart:
+        ApplyOn: PublishedVersions
+      Architectures:
+        - x86_64
+      Layers:
+        - !Sub arn:aws:lambda:${AWS::Region}:753240598075:layer:LambdaAdapterLayerX86:11
+      MemorySize: 512
+      Environment: # More info about Env Vars: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#environment-object
+        Variables:
+          AWS_LAMBDA_EXEC_WRAPPER: /opt/bootstrap
+          DENO_DIR: /tmp
+          PORT: 8000
+      Events:
+        HelloWorld:
+          Type: HttpApi
+    Metadata:
+      BuildMethod: makefile
+
+Outputs:
+  DenoFunctionApi:
+    Description: "API Gateway endpoint URL for Prod stage for Deno function"
+    Value: !Sub "https://${ServerlessHttpApi}.execute-api.${AWS::Region}.amazonaws.com/"
+  DenoFunction:
+    Description: "Deno Lambda Function ARN"
+    Value: !GetAtt DenoFunction.Arn
+  DenoFunctionIamRole:
+    Description: "Implicit IAM Role created for Deno function"
+    Value: !GetAtt DenoFunctionRole.Arn