Backend implemented using PHP.
Server used is xampp server.
Step 1: Set the path of the PHP if not set.
Step 2: Download composer into the project directory.
Step 3: Download PHPMailer into the same project directory(to send emails).
Step 4: Download dompdf into same project directory(to generate and download pdf).
Step 5: Add your email address in line number 98 of send_email.php file.
Step 6: Add the password in line number 99 of send_mail.php file of the email address written in line 98.
Step 7: Allow less secure apps on Google account mentioned in line 98 to send emails.
Step 8: Import the Database file named vaccineregistration.sql after creating a database name vaccineregistraion in XAMPP server to replicate the database and tables along with sample data.