configuration documentation

README.md

@@ -1,5 +1,9 @@
 This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
 
+## Configuration
+
+Configuration is done through environment variables. You can create a `.env` file in the root directory. See the file `app.config.ts` for the list of available environment variables.
+
 ## Getting Started
 
 First, run the development server:

app/config.ts

@@ -9,6 +9,13 @@ const config = singleton || (() => {
         GOOGLE_AUTH_CLIENT_SECRET: process.env.GOOGLE_AUTH_CLIENT_SECRET || '',
         DATABASE_NAME,
         DATABASE_URI: process.env.DATABASE_URI || ('mongodb://localhost:27017/' + DATABASE_NAME),
+        // the following variables are used by next-auth.
+        // they are included here only for reference 
+        // since they are extracted directly from 
+        // the environment. 
+        // Changing them here will have no effect.
+        NEXTAUTH_SECRET: process.env.NEXTAUTH_SECRET,
+        NEXTAUTH_URL: process.env.NEXTAUTH_URL,
     }
 
     console.log(` ______   _______         _______  _______  _______  _______  _______  _______