docs: remove environment variables values from docs

Author: MateuszRostkowski

docs/docs/environment-variables/VARIABLES_DESCRIPTION.mdx

@@ -20,16 +20,16 @@ import Details from '@site/src/components/Details'
 
 ```.env
 ANDROID_FIREBASE_CONFIG=
-API_URL=https://api.binarapps.online/
-DOPPLER_CONFIG=qa
-DOPPLER_ENVIRONMENT=qa
-DOPPLER_PROJECT=frontend
-ENVIRONMENT_NAME=qa
+API_URL=
+DOPPLER_CONFIG=
+DOPPLER_ENVIRONMENT=
+DOPPLER_PROJECT=
+ENVIRONMENT_NAME=
 IOS_FIREBASE_CONFIG=
-KEYSTORE_KEY_ALIAS=8f28dbb8551f74db7eba891a5e37db5d
-KEYSTORE_KEY_PASSWORD=a6718139b86a3d62656a18dfab89ab32
-KEYSTORE_STORE_PASSWORD=a9539aa0e7ddd93fb1998b532c47bb19
-WEB_CLIENT_ID=363534133095-3dgo2dg6r4o3ft920p4u4mhb0tmo3nlm.apps.googleusercontent.com
+KEYSTORE_KEY_ALIAS=
+KEYSTORE_KEY_PASSWORD=
+KEYSTORE_STORE_PASSWORD=
+WEB_CLIENT_ID=
 ```
 
 ## Description