you need to follow these steps:

1. Prepare your custom font files: Make sure you have the necessary font files in the proper formats (e.g., .woff, .woff2, .ttf, etc.) for your custom font. Place these font files in a directory within your Odoo module.

2. Define the font in your Odoo module's assets: In your module, create a static assets directory (e.g., static/src/fonts) and place your custom font files in this directory. Also, create a CSS file (e.g., static/src/css/custom_fonts.css) to define the font face rules.

3. Define the font face rules: In the custom_fonts.css file, define the @font-face rules for your custom font. For example:

@font-face {
font-family: 'YourCustomFontName';
src: url('/your_module_name/static/src/fonts/YourCustomFont-Regular.woff2') format('woff2'),
url('/your_module_name/static/src/fonts/YourCustomFont-Regular.woff') format('woff');
font-weight: normal;
font-style: normal;
}

Replace 'YourCustomFontName' with the actual name you want to use for your font, and adjust the paths in the url() statements to match the location of your font files within your module.

1. include the font CSS file in the assets section:

"web.assets_frontend": [ "your_module_name/static/src/fonts/YourCustomFont-Regular.woff", "your_module_name/static/src/fonts/YourCustomFont-Regular.woff2", "your_module_name/static/src/css/custom_fonts.css" ], "web.assets_qweb": [ "your_module_name/static/src/fonts/YourCustomFont-Regular.woff", "your_module_name/static/src/fonts/YourCustomFont-Regular.woff2", "your_module_name/static/src/css/custom_fonts.css" ]

1. Restart your Odoo server and update the module: After restarting the server, update your module to load the new assets.

2. Customize the website theme: Go to the Odoo backend and navigate to Website > Configuration > Website Settings. In the "Options" tab, you should now see your custom font in the font family options. Select your custom font to apply it to the website theme.