chore: update gitignore & readme

.gitignore

@@ -33,3 +33,6 @@ yarn-error.log*
 # typescript
 *.tsbuildinfo
 next-env.d.ts
+
+_config/_goAPI/vendor
+_config/_goAPI/assets

README.md

@@ -13,6 +13,27 @@ Currently the API/CDN endpoint is at:
 https://assets.smold.app/api/token/[chainID]/[tokenAddress]/[fileName].[ext]
 ```
 
+## Usage
+
+It's recommanded to use PNG files. They are smaller and faster to load, come in two sizes (32x32 and 128x128) and are supported by all browsers.
+SVG files are also available, but they are larger and slower to load and can hurt performances for poorly optimized assets or very complex ones (ex: curvefi icon).
+
+## (Self) Hosting
+
+The repo comes with two different server systems in `_config`:
+- a `golang` server, that serve the assets from github
+- a `node` server, configured to work with Vercel. If you want to self host, here is the config we are using:
+```
+Framework Preset: Next.js
+Build Command: yarn --cwd _config/nodeAPI/ run build
+Output Directory: _config/nodeAPI/.next
+Install Command: yarn install && yarn --cwd _config/nodeAPI/ install
+Development Command: next
+Node Version: 18.x
+Environment Variables: None
+```
+
+
 ## Contributing
 
 You will need an SVG file of the logo of the asset. You can use