docs(README): clarify installation instructions, resolve #107

Author: louh

README.md

@@ -2,14 +2,26 @@
 
 ## Development
 
+### Quick start
+
 ```
-$ yarn start
+$ yarn install // installs all dependencies
+$ yarn start   // starts local server
 ```
 
-or
+When started successfully, you may access the local server at http://localhost:8000/
+
+### Troubleshooting
+
+Some issues can be resolved by clearing the cache and rebuilding files. The first command is less destructive, while the second resets your local environment from scratch.
 
 ```
 $ yarn clear // clears local cache, builds (excludes node_modules)
+```
+
+or
+
+```
 $ yarn clean // clears local cache, builds, node_modules, yarn trash
 ```