Step 1:
Import the font file on your index.html file present on the root directory of Foodomaa.
Example:
<link href='http://fonts.googleapis.com/css?family=Roboto' rel='stylesheet' type='text/css'>
Step2:
Open the main.css file present in /assets/css directory.
In html and bodytags, change the font-family property to: 'Roboto', sans-serif;
Example:

Step 3:
Close all incognito tabs and then open only one and load your website.