It is recommended to store template image assets in your theme directory:
In the production build SVGs and other image assets will go through a minification process.
Fonts are always special. Importing fonts in email clients can be tricky. We recommend using Goole Fonts and embed them directly in the HTML head:
<link rel="preconnect" href="https://fonts.gstatic.com" /> <link href="https://fonts.googleapis.com/css2?family=Montserrat:wght@100;200;400&display=swap" rel="stylesheet" data-embed />
Make sure the attribute data-embed is there.