add development Section

README.md

@@ -63,6 +63,8 @@ port it listens on.
    You do not need it for small fixes.
 4. run `npm start`
 
+## Development
+
 If you want automatic reloading of files during development,
 you can install `nodemon`:
 ```
@@ -73,6 +75,12 @@ Run it:
 nodemon index.js --watch lib
 ```
 
+To generate the layout, install `node-sass`.
+Then, run
+```
+node build-styles.js
+```
+
 ## Improve me
 
 Feel free to add a caching layer, improve the styles

package.json

@@ -18,7 +18,6 @@
     "build-styles": "node build-styles.js"
   },
   "devDependencies": {
-    "node-sass": "^4.12.0"
   },
   "keywords": [
     "mastodon",