In the commands below, replace <aws-region> and <aws-account-number>.
Create ECR repository
aws ecr create-repository --region <aws-region> --repository-name lambda-scala-example
Login to ECR
aws ecr get-login-password --region <aws-region> | docker login --username AWS --password-stdin <aws-account-number>.dkr.ecr.<aws-region>.amazonaws.com
Build and tag the image
docker build . -t <aws-account-number>.dkr.ecr.<aws-region>.amazonaws.com/lambda-scala-example
Push the image
docker push <aws-account-number>.dkr.ecr.<aws-region>.amazonaws.com/lambda-scala-example