$ yarn install // installs all dependencies
$ yarn start // starts local server
When started successfully, you may access the local server at http://localhost:8000/
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
$ yarn build // creates site bundle