Setup a Cron on server for specific interval like daily, and the script will check and pull the code from Github if there is any new release in repository. Change the variables according to your project and github account.

gitpull.sh

#! /bin/bash  

USER="takshaktiwari"
PERSONAL_TOKEN="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"
AUTHOR="takshaktiwari"
PACKAGE="adash"

REMOTE_NAME="origin"
BRANCH="main"

SOURCE_FILE="gitpull.sh"
RELEASE_FILE="latest_release.json"
TEMP_FILE="temp"
NEWLINE=$'\n'

[ ! -e .gitignore ] && touch .gitignore
if [ -z $(cat .gitignore | grep $RELEASE_FILE) ]
    then
        echo $NEWLINE >> .gitignore
        echo $SOURCE_FILE >> .gitignore
        echo $RELEASE_FILE >> .gitignore
        echo $TEMP_FILE >> .gitignore
fi

[ ! -e $RELEASE_FILE ] && touch $RELEASE_FILE
PREV_RELEASE=$(jq '.tag_name' $RELEASE_FILE)

which curl > /dev/null 2>&1
[ ! $? == 0 ] && sudo apt install curl -y

which jq > /dev/null 2>&1
[ ! $? == 0 ] && sudo apt install jq -y

which git > /dev/null 2>&1
[ ! $? == 0 ] && sudo apt install git -y


curl  -u $USER:$PERSONAL_TOKEN "https://api.github.com/repos/${AUTHOR}/${PACKAGE}/releases/latest" -o $TEMP_FILE

LATEST_RELEASE=$(jq '.tag_name' $TEMP_FILE)

if [ $PREV_RELEASE != $LATEST_RELEASE ]
    then
        git stash
        git pull $REMOTE_NAME $BRANCH
fi

rm $TEMP_FILE;