Update setup instructions

.env.example

@@ -1,6 +1,9 @@
-APPWRITE_FUNCTION_API_KEY=""
-PUBLIC_APPWRITE_HOST="http://localhost/v1"
-PUBLIC_MAX_FILE_SIZE="300000000" # Note: Must be the same as in the _APP_STORAGE_LIMIT in the Appwrite env file
-PUBLIC_DISABLE_REGISTRATION="true" # Note: In the Appwrite console you have to change your user limit to 0 if false and else to 1
-PUBLIC_DISABLE_HOME_PAGE="false"
-PUBLIC_MAIL_SHARE_ENABLED="false"
+# Appwrite
+APPWRITE_FUNCTION_API_KEY=your-api-key
+PUBLIC_APPWRITE_HOST=http://localhost/v1
+
+# Frontend
+PUBLIC_MAX_FILE_SIZE=300000000 # Note: Should be the same as in the _APP_STORAGE_LIMIT in the Appwrite .env file
+PUBLIC_DISABLE_REGISTRATION=true # Note: In the Appwrite console you have to change your user limit to 0 if false and else to 1
+PUBLIC_DISABLE_HOME_PAGE=false
+PUBLIC_MAIL_SHARE_ENABLED=false