Updated contribution instructions

README.md

@@ -2,15 +2,12 @@
 
 # Simple Icons
 
-## Build Process
+## Want to contribute?
 
-1. Acquire source vector file.
-1. Simplify icon in vector editing tool (I use [Affinity Designer](https://affinity.serif.com/en-gb/)).
-   - Constrain within a 16x16 viewbox.
-   - Ensure there are no strokes.
-   - Simplify and minimise paths.
-   - Make all paths white.
-1. Export SVG.
-1. Run SVGO on the SVG file.
-1. Add object to [simple-icons.json](https://github.com/danleech/simple-icons/blob/gh-pages/src/simple-icons.json).
-1. Run [build.js](https://github.com/danleech/simple-icons/blob/gh-pages/src/build.js) in Node.
+1. Find an official source vector image.
+2. Use your SVG editor of choice to produce a monochrome icon (with a view to keeping the file size as small as possible).
+3. Optimize the SVG using SVGO and add it to the `/icons` directory.
+4. Add an entry to `/src/simple-icons.json` with:
+   - The icon title
+   - The HEX colour value
+   - The URL of the source vector image (or the page it’s available at)