Because Hem is awesome but missing one thing...
npm install -g proxy-hem
The proxy server will setup to run at http://localhost:3000 by default. Configuration for this is coming soon.
Proxy-hem should be run from the directory where the slug.json file exists. You can specify a port for Hem to use using -p. Otherwise, the only Hem command used is 'server'.
The API server is expected to be running at https://localhost:4000. Configuration for this is coming soon.
For Hem usage, see Hem guide