https://www.apachefriends.org/download.html
After installing xampp server create and new folder inside htdocs folder of xampp installation directory in our case lets create a pos folder inside htdocs.
At this stage open xampp control panel and start Apache and Mysql. Click on the checkbox next to apache and mysql to add both into window services this make sure that whenever you restart pc you don't need to start apache and mysql manually.
After starting both services as shown in the above image close the xampp control panel, Process will be running in the background.
Now navigate to the newly created folder inside htdocs directory. In our case htdocs/pos folder. See the blow image for reference.
Navigate inside the pos folder and paste the files located inside the App folder that you have downloaded from envato purchase. See the image below for the reference of app structure.
Open a new tab in your browser and open phpmyadmin by using the url given below. Create a new database name medix_v4 as shown in the reference image below.
http://localhost/phpmyadmin
After creating database in phpmyadmin . Copy the database from the downloaded folder and import inside newly created database in our case it was medix_v4.See below image for the reference.
Choose the database and click on the import button on phpmyadmin.
Now close this tab and navigate to the app installation directory inside htdocs/pos/backend/.env folder of xampp server and edit the .env file See the image below for the reference.
Xampp/htdocs/pos/backend/.env
Left click on .env file and edit this file . Set the following variables DB_DATABASE,DB_USERNAME,DB_PASSWORD
Set DB_DATABASE name that your have create in phpmyadmin leave DB_USERNAME and DB_PASSWORD to default, if you have not created. The default user name would be root and password would be empty.In this case we have left it empty See the below image for the reference.
Now open a new tab on your browser and type the url of your sub domain.If everything is good you will be able to see the installation screen of the app.