To copy files to ec2, use the included by default scp tool in linux
Command
First follow this tutorial to isolate issues: ssh into the Ec2
scp -i ~/path/to/new-key.pem -r ./path/to/copy/from/dist/ ec2-user@xxx.ap-southeast-2.compute.amazonaws.com:~/path/on/ec2
Fixing forbidden errors
If you get forbidden errors, please ensure that you can ssh into the Ec2.