docs: update variables docs

Author: MateuszRostkowski

docs/docs/environment-variables/VARIABLES_DESCRIPTION.mdx

@@ -19,17 +19,17 @@ import Details from '@site/src/components/Details'
 ## List of all variables
 
 ```.env
-ANDROID_FIREBASE_CONFIG=
-API_URL=
-DOPPLER_CONFIG=
-DOPPLER_ENVIRONMENT=
-DOPPLER_PROJECT=
-ENVIRONMENT_NAME=
-IOS_FIREBASE_CONFIG=
-KEYSTORE_KEY_ALIAS=
-KEYSTORE_KEY_PASSWORD=
-KEYSTORE_STORE_PASSWORD=
-WEB_CLIENT_ID=
+ANDROID_FIREBASE_CONFIG
+API_URL
+DOPPLER_CONFIG
+DOPPLER_ENVIRONMENT
+DOPPLER_PROJECT
+ENVIRONMENT_NAME
+IOS_FIREBASE_CONFIG
+KEYSTORE_KEY_ALIAS
+KEYSTORE_KEY_PASSWORD
+KEYSTORE_STORE_PASSWORD
+WEB_CLIENT_ID
 ```
 
 ## Description
@@ -38,7 +38,7 @@ WEB_CLIENT_ID=
 
 This is google-services.json file encoded with base64
 
-> NOTE: More detailed instruction will be added in near future
+[Detailed instruction](/docs/expo-notifications#android)
 
 </Details>