Setup automatic deployment on your server using this shell script. After this shell script is executed you can deploy code using "git push server master"

setup.sh

#!/bin/bash
# A bash script to setup GIT like deployment on your server
echo "Enter your server address e.g 25.32.132.1 or yourserver.com"
read serverAddress
echo "Enter Username which you use to login to your server e.g ubuntu"
read username
echo "Enter path of the private key (optional)"
read privateKeyPath
echo "Path of your server directory where code should reside: e.g ~/code or /var/www (required)" 
read tempPath
echo "Path of your local directory: (required)"
read localDirectory
echo "Enter name of your application: (required)"
read appName
echo "Command to run after each deployment: (optional) "
read deployCommand

#TODO: Validate user input and show approproate errors.

#Checking if the ssh-keys are present in the system
if [ ! -f ~/.ssh/id_rsa ]; then
	echo "SSH-KEYS not found, generating ssh-keys"
	echo "Enter your email:"
	read email
	ssh-keygen -t rsa -b 4096 -C "$email"
	eval "$(ssh-agent -s)"
	ssh-add ~/.ssh/id_rsa
fi

#Adding the SSH key as Authorized Key in the remote server
echo "Trying to SSH into the server "$serverAddress" as "$username
if [ ! -z "$privateKeyPath"]; then
	echo "Using private key "$privateKeyPath
fi

echo "Adding SSH into Server's Authorized Keys.."
if [ ! -z "$privateKeyPath"]; then
	cat ~/.ssh/id_rsa.pub | ssh $username@$serverAddress -i $privateKeyPath 'mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys'
else
	cat ~/.ssh/id_rsa.pub | ssh $username@$serverAddress 'mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys'
fi

git -C $localDirectory status
if [ ! $? -eq 0 ]; then
	echo "Please initalise git in your "$localDirectory" first".
	exit
fi
REMOTE_HOME="$(ssh $username@$serverAddress 'echo $HOME')"
wait
remoteDirPath="${tempPath/\~/$REMOTE_HOME}"
echo $remoteDirPath

text="#!/bin/sh\ngit --work-tree="$remoteDirPath" --git-dir="$REMOTE_HOME"/_repo/"$appName".git checkout -f\n"$deployCommand

ssh $username@$serverAddress 'sudo -S apt-get install -y git && mkdir -p _repo && cd _repo && mkdir -p '$appName'.git && cd '$appName'.git && git init --bare && cd hooks && printf "'$text'" > post-receive && chmod +x ./post-receive && mkdir -p '$remoteDirPath
git -C $localDirectory remote add server ssh://$username@$serverAddress$REMOTE_HOME/_repo/$appName.git
echo "All Set"
echo "Now you can deploy your code using 'git push server master'"