auth0 example is broken

[sdroscher]

Trying to run the remix-auth-auth0 locally or in Codesandbox results in the following error when you click the login button:

TypeError: Cannot read property 'startsWith' of undefined
    at Auth0Strategy.getCallbackURL (/sandbox/node_modules/remix-auth-oauth2/build/index.js:182:30)
    at Auth0Strategy.authenticate (/sandbox/node_modules/remix-auth-oauth2/build/index.js:78:32)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at Object.callRouteActionRR (/sandbox/node_modules/@remix-run/server-runtime/dist/data.js:24:16)
    at callLoaderOrAction (/sandbox/node_modules/@remix-run/router/router.ts:3125:14)
    at submit (/sandbox/node_modules/@remix-run/router/router.ts:2609:16)
    at queryImpl (/sandbox/node_modules/@remix-run/router/router.ts:2544:22)
    at Object.queryRoute (/sandbox/node_modules/@remix-run/router/router.ts:2494:18)
    at handleDataRequestRR (/sandbox/node_modules/@remix-run/server-runtime/dist/server.js:81:20)
    at requestHandler (/sandbox/node_modules/@remix-run/server-runtime/dist/server.js:55:18)

[alsherko]

@sdroscher I think you just need setup .env file. Check .env.example in remix-auth-auth0