Added StepFunctionsStartExecutionIntegration and StepFunctionsStartSy…

…ncExecutionIntegration.

Added unit and integration tests.
Fixed issues mentioned in the Pull-request.
Added example to README

closes aws#11947.

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,34 @@
+---
+name: "\U00002753 General Issue"
+about: Create a new issue
+labels: needs-triage
+---
+
+<!-- NOTE:📕 If issue regarding developer guide, please create issue [here](https://github.com/awsdocs/aws-cdk-guide/issues) -->
+
+## :question: General Issue
+
+<!--
+⚠️ Important Information
+For support questions, please first reference our [documentation](https://docs.aws.amazon.com/cdk/api/latest), then use [Stackoverflow](https://stackoverflow.com/questions/ask?tags=aws-cdk). This repository's issues are intended for feature requests and bug reports.
+-->
+
+### The Question
+<!--
+Ask your question here. Include any details relevant. Make sure you are not
+falling prey to the [X/Y problem][2]!
+
+[2]: http://xyproblem.info
+-->
+
+### Environment
+
+  - **CDK CLI Version:** <!-- Output of `cdk version` -->
+  - **Module Version:** <!-- Version of the module in question -->
+  - **Node.js Version:** <!-- Version of Node.js (run the command `node -v`) -->
+  - **OS:** <!-- [all | Windows 10 | OSX Mojave | Ubuntu | etc... ] -->
+  - **Language:** <!-- [all | TypeScript | Java | Python ] etc... ] -->
+
+
+### Other information
+<!-- e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. associated pull-request, stackoverflow, slack, etc -->

.github/ISSUE_TEMPLATE/bug.md

@@ -0,0 +1,54 @@
+---
+name: "\U0001F41B Bug Report"
+about: Report a bug
+title: "(module name): short issue description"
+labels: bug, needs-triage
+---
+
+<!--
+description of the bug:
+-->
+
+
+
+
+### Reproduction Steps
+
+<!--
+minimal amount of code that causes the bug (if possible) or a reference.
+
+The code sample should be an SSCCE. See http://sscce.org/ for details.
+In short, provide a code sample that we can copy/paste, run and reproduce.
+-->
+
+### What did you expect to happen?
+
+<!--
+What were you trying to achieve by performing the steps above?
+-->
+
+### What actually happened?
+
+<!--
+What is the unexpected behavior you were seeing? If you got an error, paste it here.
+-->
+
+
+### Environment
+
+  - **CDK CLI Version  :**
+  - **Framework Version:**
+  - **Node.js Version:** <!-- Version of Node.js (run the command `node -v`) -->
+  - **OS               :**
+  - **Language (Version):** <!-- [all | TypeScript (3.8.3) | Java (8)| Python (3.7.3) | etc... ] -->
+
+### Other
+
+<!-- e.g. detailed explanation, stacktraces, related issues, suggestions on how to fix, links for us to have context, eg. associated pull-request, stackoverflow, slack, etc -->
+
+
+
+
+--- 
+
+This is :bug: Bug Report

.github/ISSUE_TEMPLATE/doc.md

@@ -0,0 +1,29 @@
+---
+name: "📕 Documentation Issue"
+about: Issue in the reference documentation or developer guide
+title: "(module name): short issue description"
+labels: feature-request, documentation, needs-triage
+---
+
+<!-- 
+- developer guide? raise issue/pr here: https://github.com/awsdocs/aws-cdk-guide
+- want to help? submit a pull request here: https://github.com/aws/aws-cdk
+-->
+
+<!--
+link to reference doc page:
+-->
+
+
+
+<!--
+describe your issue:
+-->
+
+
+
+
+
+---
+
+This is a 📕 documentation issue

.github/ISSUE_TEMPLATE/feature-request.md

@@ -0,0 +1,46 @@
+---
+name: "\U0001F680 Feature Request"
+about: Request a new feature
+title: "(module name): short issue description"
+labels: feature-request, needs-triage
+---
+
+<!-- short description of the feature you are proposing: -->
+
+
+
+
+
+### Use Case
+
+<!-- why do you need this feature? -->
+
+
+
+
+
+### Proposed Solution
+
+<!-- Please include prototype/workaround/sketch/reference implementation: -->
+
+
+
+
+
+### Other
+
+<!-- 
+e.g. detailed explanation, stacktraces, related issues, suggestions on how to fix, 
+links for us to have context, eg. associated pull-request, stackoverflow, slack, etc
+-->
+
+
+
+
+
+* [ ] :wave: I may be able to implement this feature request
+* [ ] :warning: This feature might incur a breaking change
+
+---
+
+This is a :rocket: Feature Request

.github/ISSUE_TEMPLATE/general-issues.md

@@ -0,0 +1,35 @@
+---
+name: "\U00002753 General Issue"
+about: Create a new issue
+title: "(module name): short issue description"
+labels: needs-triage, guidance
+---
+
+<!-- NOTE:📕 If there is an issue regarding developer guide, please create an issue [here](https://github.com/awsdocs/aws-cdk-guide/issues) -->
+
+## :question: General Issue
+
+<!--
+⚠️ Important Information
+For support questions, please first reference our [documentation](https://docs.aws.amazon.com/cdk/api/latest), then use [Stackoverflow](https://stackoverflow.com/questions/tagged/aws-cdk). This repository's issues are intended for feature requests and bug reports.
+-->
+
+### The Question
+<!--
+Ask your question here. Include any details relevant. Make sure you are not
+falling prey to the [X/Y problem][2]!
+
+[2]: http://xyproblem.info
+-->
+
+### Environment
+
+  - **CDK CLI Version:** <!-- Output of `cdk version` -->
+  - **Module Version:** <!-- Version of the module in question -->
+  - **Node.js Version:** <!-- Version of Node.js (run the command `node -v`) -->
+  - **OS:** <!-- [all | Windows 10 | macOS Mojave | Ubuntu | etc... ] -->
+  - **Language (Version):** <!-- [all | TypeScript (3.8.3) | Java (8)| Python (3.7.3) | etc... ] -->
+
+
+### Other information
+<!-- e.g. detailed explanation, stacktraces, related issues, suggestions on how to fix, links for us to have context, eg. associated pull-request, stackoverflow, slack, etc -->

.github/ISSUE_TEMPLATE/tracking.md

@@ -0,0 +1,68 @@
+---
+name: "📊 Tracking Issue"
+title: "📊Tracking: [service]"
+about: Add a module tracking issue (internal use only)
+labels: management/tracking
+---
+
+Add your +1 👍  to help us prioritize high-level constructs for this service
+--- 
+
+### Overview:
+<!-- 
+Summary of the service (leverage the service’s product page for the text) and a link to the relevant AWS Docs. 
+This should be the same text that we put at the top of the package’s README.md. Also include a link to the 
+service’s CDK Construct Library API reference page.
+-->
+
+
+
+
+
+
+[AWS Docs](url)  <!-- replace `url` with link to the relevant AWS Docs -->
+
+### Maturity: CloudFormation Resources Only
+<!--
+The valid maturity states are: CloudFormation Resources Only, Experimental, Developer Preview, Stable
+-->
+
+See the [AWS Construct Library Module Lifecycle doc](https://github.com/aws/aws-cdk-rfcs/blob/master/text/0107-construct-library-module-lifecycle.md) for more information about maturity levels.
+
+
+### Implementation:
+<!-- 
+Checklist of use cases, constructs, features (such as grant methods) that will ship in this package 
+(not required until the issue is added to the public roadmap)
+- [ ] 
+- [ ]
+-->
+See the [CDK API Reference](url) for more implementation details.<!-- replace `url` with link to the service's CDK API reference -->
+
+
+
+
+
+
+### Issue list:
+<!-- 
+e.g. checklist of links to feature requests, bugs, and PRs that are in scope for GA release of this module 
+(not required until the issues is added to the public roadmap)
+- [ ] 
+- [ ]
+-->
+
+
+
+
+
+
+<!-- 
+Labels to add:
+    - package/[name] (create new labels if they don’t already exist)
+    - needs-design (if cfn-only)
+    - management/roadmap (when added to the roadmap)
+    - in-progress (when added to “working on it” column of the roadmap)
+-->
+--- 
+This is a  📊Tracking Issue

packages/@aws-cdk/aws-apigatewayv2-integrations/README.md

@@ -20,6 +20,7 @@
 - [HTTP APIs](#http-apis)
   - [Lambda Integration](#lambda)
   - [HTTP Proxy Integration](#http-proxy)
+  - [AWS Service Integration](#aws-service)
   - [Private Integration](#private-integration)
 - [WebSocket APIs](#websocket-apis)
   - [Lambda WebSocket Integration](#lambda-websocket-integration)
@@ -77,6 +78,50 @@ httpApi.addRoutes({
   integration: booksIntegration,
 });
 ```
+### AWS Service
+
+You can integrate your HTTP API with AWS services by using first-class integrations. A first-class integration connects 
+an HTTP API route to an AWS service API. When a client invokes a route that's backed by a first-class integration, 
+API Gateway invokes an AWS service API for you. More information can be found at [Working with AWS service integrations for HTTP APIs]
+(https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-develop-integrations-aws-services.html).
+
+The following code configures a route `POST /start` to start execution of Standard Step Functions state machine.
+
+```ts
+const httpApi = new HttpApi(stack, 'HttpApi');
+const state = new StateMachine(stack, 'MyStateMachine', {
+  definition: Chain.start(new Pass(stack, 'Pass')),
+  stateMachineType: StateMachineType.STANDARD,
+});
+httpApi.addRoutes({
+  path: '/start',
+  methods: [ HttpMethod.POST ],
+  integration: new StepFunctionsStartExecutionIntegration({
+    stateMachine: state,
+    input: '$request.body',
+    timeout: Duration.seconds(10),
+  }),
+});
+```
+
+The following code configures a route `POST /start` to start synchronous execution of Express Step Functions state machine.
+
+```ts
+const httpApi = new HttpApi(stack, 'HttpApi');
+const state = new StateMachine(stack, 'MyStateMachine', {
+  definition: Chain.start(new Pass(stack, 'Pass')),
+  stateMachineType: StateMachineType.EXPRESS,
+});
+httpApi.addRoutes({
+  path: '/start',
+  methods: [ HttpMethod.POST ],
+  integration: new StepFunctionsStartSyncExecutionIntegration({
+    stateMachine: state,
+    input: '$request.body',
+    timeout: Duration.seconds(10),
+  }),
+});
+```
 
 ### Private Integration