yarn install --force # Because we sometimes get issues with sharp
yarn run develop

You can view the website in browser at http://localhost:8000/

Gatsby sometimes goes wrong/gets confused. First port of call is to kill it, then clear the .cache and public folders:

rm -Rf .cache public

Requires Node version 12

nvm use 12

If you are running Windows and encounter an error installing fsevents, then try:

yarn install --ignore-optional --force