docker build -t nextjs-app .

aws ecr get-login-password --region ap-southeast-1

Then it will come out the password

2. login

docker login -u AWS -p somePassword 123456789012.dkr.ecr.us-east-1.amazonaws.com

3. tag

docker tag nextjs-app:latest 123456789012.dkr.ecr.us-east-1.amazonaws.com/nextjs-app:latest

4. push

docker push 123456789012.dkr.ecr.us-east-1.amazonaws.com/nextjs-app:latest

Below example for docker login stdin with aws get password

aws ecr get-login-password --region ap-southeast-1 | docker login -u AWS --password-stdin 123456789012.dkr.ecr.us-east-1.amazonaws.com