This project runs a serverless application locally by implementing Lambdas, API Gateway, and DynamoDB. This project uses AWS SAM. Tutorial on getting AWS SAM running locally.
This project has a companion client-side project for UI interactions.
.env file:
DYNAMODB_ENDPOINT=http://docker.for.mac.host.internal:8000
AWS_UPLOAD_BUCKET=YOUR_AWS_UPLOAD_BUCKET
AWS_UPLOAD_BUCKET_REGION=YOUR_AWS_UPLOAD_BUCKET_REGION
A few notes.
Have an account specifically for uploading to your S3 bucket.
Also know that if you attempt to use a local enviornment variable named AWS_ACCESS_KEY_ID (process.env.AWS_ACCESS_KEY_ID) it will be overridden (when run locally) by your aws configure value. Thus, specify unique environment variables for uploading to S3 to most closely mimic other enviornments.
AWS_S3_UPLOAD_ACCESS_KEY_ID=YOUR_KEY
AWS_S3_UPLOAD_SECRET_ACCESSKEY=YOUR_SECRET_ACCESS_KEY