[312] Update readme for local development

Author: adamc-sp

README.md

@@ -27,7 +27,22 @@ cp ENV.local .env
 
 npm run build
 ```
-You can find the builded version into terminusdb-dashboard/packages/tdb-dashboard/dist
+You can find the built version into terminusdb-dashboard/packages/tdb-dashboard/dist
+
+**Locally Developing the dashboard**
+
+Running `npm run start` instead of `build` starts a server and watches for changes. Because of the way this is configured, you will need to go to `/dashboard` after connecting in browser
+
+```sh
+npm run start
+```
+
+There are some differences depending on how you are developing it, if you are just running the dashboard repo locally:
+
+- Comment out the `@terminusdb/terminusdb-client` alias in the webpack config
+- Update the env file to have the `BASE_URL` be empty (also generally useful since this is where the webpack server opens the new browser window), this will mean you don't have to go to `/dashboard` as above
+
+There is some additional configuration needed if you are wanting to run with Auth0 Login, essentially you just need a proxy and to setup the right auth0 config. This will allow you to login but the token generated will not be valid so you will need to replace it manually with a valid one.
 
 ## Publishing