Push code on AWS or Digital Ocean with the use of Hook 

Login to your VPS from command line and type the following:

cd /var
mkdir repo

cd repo
mkdir site.git

cd site.git
git init --bare

cd hooks

touch post-receive

nano post-receive

copy below line 2 lines into post-recieve and change both path 

#!/bin/sh
git --work-tree=/var/www/domain.com --git-dir=/var/repo/site.git checkout -f 

Change permission of post-receive file

chmod +x post-receive

Your Local System: 

cd /my/workspace
mkdir project && cd project
git init

git remote add hemant ssh://user@mydomain.com/var/repo/site.git 

git add .
git commit -m "My project is ready"

git push hemant master 

and run the following command to add ssh key to your server - 

cat ~/.ssh/id_rsa.pub | ssh -i /home/hemant/Desktop/test-runner.pem 
ubuntu@52.35.102.26  "mkdir -p ~/.ssh && cat >>  
~/.ssh/authorized_keys" 

Note: Guys If you have doubt here, Please ask me friendly...

Thanks,

Hemant gupta