adding gradio example

examples/cdk/gradio/.gitignore

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+.aws-sam
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examples/cdk/gradio/README.md

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+# Gradio example
+
+A basic Gradio application example. You can build and test it locally as a typical Gradio application.
+
+Using AWS Lambda Web Adapter, You can package this web application into Docker image, push to ECR, and deploy to Lambda, ECS/EKS, or EC2.
+
+The application can be deployed in an AWS account using the [Serverless Application Model](https://github.com/awslabs/serverless-application-model). 
+
+
+Here will see how to do it by [AWS CDK](https://aws.amazon.com/cdk/) 
+
+# Pre-requisites
+* [AWS CLI](https://aws.amazon.com/cli/)
+* [Python](https://www.python.org/)
+* [Docker](https://www.docker.com/products/docker-desktop)
+* [AWS CDK](https://docs.aws.amazon.com/cdk/v2/guide/getting_started.html)
+
+
+
+### IAM Rules:
+- permission to Pull images from Public Repository
+```json
+{
+    "Version": "2012-10-17",
+    "Statement": [
+        {
+            "Effect": "Allow",
+            "Action": "ecr-public:PutRegistryAlias",
+            "Resource": "arn:aws:ecr-public::123456789012:registry/*"
+        }
+    ]
+}
+```
+
+### CDK Env variables
+```bash
+CDK_DEFAULT_ACCOUNT=$(aws sts get-caller-identity --query Account)
+CDK_DEFAULT_REGION=$(aws configure get region)
+```
+
+
+
+## Dockerfile
+
+```Dockerfile
+# Base Image
+FROM public.ecr.aws/docker/library/python:3.8.12-slim-buster 
+# Lambda Adapter
+# lambda adapter binary into /opt/extensions. This is the only change to run the application on Lambda.
+COPY --from=public.ecr.aws/awsguru/aws-lambda-adapter:0.8.4 /lambda-adapter /opt/extensions/lambda-adapter
+ENV PORT=8080
+
+WORKDIR /var/task
+
+# Install system dependencies if needed
+RUN apt-get update && apt-get install -y --no-install-recommends build-essential && rm -rf /var/lib/apt/lists/*
+
+# Copy and install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Expose Gradio default port
+EXPOSE 8080
+
+# Use explicit Python interpreter path
+CMD ["python", "app.py"]
+```
+
+Line 2 *copies lambda adapter binary into /opt/extensions. This is the only change to run the Flask application on Lambda.*
+
+# Build and Deploy
+
+In cdk.json we focusing on cdk.py
+```json
+{
+    "app": "python3 cdk.py"
+}
+```
+
+
+In addition to Lambda function add function url so it'll easy for redirect. but it'll refresh whenever lambda function refreshes.
+
+```py
+# STACK
+class GradioLambdaFn(Stack):
+    def __init__(self,scope:Construct,construct_id:str,**kwargs)->None:
+        super().__init__(scope,construct_id,**kwargs)
+
+        # Lambda Fn
+        lambda_fn = DockerImageFunction(
+                            self,
+                            id="AWSLambdaAdapterGradioExample",
+                            code=DockerImageCode.from_image_asset( directory= os.path.dirname(__file__) , file="Dockerfile"),
+                            architecture=Architecture.X86_64,
+                            timeout=Duration.minutes(10),                   
+        )
+
+        # HTTP URL add
+        fn_url = lambda_fn.add_function_url(auth_type=FunctionUrlAuthType.NONE)
+
+        # print
+        CfnOutput(self,id="functionURL",value=fn_url.url,description="cfn_output")
+
+# APP
+app = App()
+gradio_lambda = GradioLambdaFn(app,"GradioLambda",env=env)
+app.synth()
+```
+
+
+
+# Deploy CDK
+Navigate to folder and use the CDK CLI to build a CloudFormation Stack
+
+To deploy cdk app into AWS
+```bash
+cdk synth 
+cdk deploy --verbose
+cdk destroy
+```
+
+## Verify it works
+Open URL's URL in a browser, here we print in the console by `CfnOutput` you should see "Gradio" on the page.