Update configuration.mdx

pages/backend/configuration.mdx

@@ -4,20 +4,44 @@ title: 'Configuration'
 
 # Backend Config Reference
 
-The backend can be configured using:
+The backend can be configured in 3 different ways:
 
+- Make a `config.json` file in the working directory of the application (root of repository)
+- Make a `.env` file in the working directory of the application (root of repository)
 - Add environment variables to your system (or container)
 
+These different config options are all mutually inclusive, so you can use multiple at the same time if you want to.
+
 <Warning>
   With any of these configurations, you have to have atleast three variables set
-  for the server to function: [`DATABASE_URL`](#postgres-connection-⚠),
+  for the server to function: [`postgres.connection`](#postgres-connection-⚠),
-  [`CRYPTO_SECRET`](#crypto-session-secret-⚠) and
+  [`crypto.sessionSecret`](#crypto-session-secret-⚠) and
-  [`META_NAME`](#meta-name-⚠)
+  [`meta.name`](#meta-name-⚠)
 </Warning>
 
-### Method - Environment
+### Method 1 - `config.json`
 
-You add the variables to the environment.
+This method uses nesting, so the key `server.basePath` with the value of `"/backend"` will result in a file that looks like this:
+
+```json
+{
+  "server": {
+    "basePath": "/backend"
+  }
+}
+```
+
+### Method 2 - `.env`
+
+The environment variable names use double underscores as separators and `MWB_` as the prefix. So the key `server.basePath` will result in the .env file like this:
+
+```sh
+MWB_SERVER__BASE_PATH=/backend
+```
+
+### Method 3 - Environment
+
+This method is identical to the `.env` method listed above, but you add the variables to the environment instead of writing it in a file.
 
 # Reference