added docker for lambda example

deployment/lambda/lambda_example/docker/Dockerfile

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+# AWS Lambda python pacakge
+FROM public.ecr.aws/lambda/python:3.11
+
+# Copy function code
+COPY deployment/lambda_example/app.py ./
+
+# Set the CMD to your handler
+CMD ["app.handler"]

deployment/lambda/lambda_example/docker/app.py

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+"""
+A quick example of lambda working a function in python
+"""
+
+def handler(event, context):
+    try:
+        s3_uri = event.get("file_location")
+        if not s3_uri:
+            return {
+                "statusCode": 400,
+                "body": "Missing 'file_location' in event"
+            }
+        print(f"s3 uri is {s3_uri}")
+
+        return {
+            "statusCode": 200,
+            "body": f"s3 uri {s3_uri}"
+        }
+
+    except Exception as e:
+        print(f"❌ Error: {e}")
+        return {
+            "statusCode": 500,
+            "body": str(e)
+        }

deployment/lambda/lambda_example/docker/ecr.tf

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+# ECR repo for lambda_example
+resource "aws_ecr_repository" "lambda_example" {
+  name = "lambda_example"
+}
+
+# ECR policy to allow Lambda access
+resource "aws_ecr_repository_policy" "lambda_example_ecr_access" {
+  repository = aws_ecr_repository.lambda_example.name
+
+  policy = jsonencode({
+    Version = "2008-10-17",
+    Statement = [{
+      Sid       = "AllowLambdaPull",
+      Effect    = "Allow",
+      Principal = {
+        Service = "lambda.amazonaws.com"
+      },
+      Action = [
+        "ecr:GetDownloadUrlForLayer",
+        "ecr:BatchGetImage",
+        "ecr:BatchCheckLayerAvailability"
+      ]
+    }]
+  })
+}

deployment/lambda/lambda_example/docker/provider.tf

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+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 6.3.0"
+    }
+  }
+  backend "s3" {
+    bucket  = "survey-extractor-tf-state"
+    region  = "eu-west-2"
+    profile = "domna.dev" # /home/vscode/aws/credentials
+    key     = "env:/dev/lambda/ecr/lambda_example_ecr.tfstate"
+  }
+
+  required_version = ">= 1.2.0"
+}