Image resizer lambda function triggered by S3 example

Guide on uploading to AWS

1. zip the file zip -r function.zip .
2. run the command for creating a new function if the function doesn't exist yet
3. run command for updating if the function already exist

create function

aws lambda create-function --function-name create-thumbnail --zip-file fileb://function.zip --profile qhkm --region ap-northeast-1 --role arn:aws:iam::3213213213123:role/lambda-s3-role --timeout 10 --memory-size 1024 --runtime nodejs12.x --handler index.handler

update function

aws lambda update-function-code --function-name create-thumbnail --zip-file fileb://function.zip --profile qhkm --region ap-northeast-1