Update README.md about how to contribution and how to make .env file.

@@ -71,6 +71,15 @@ npm run dev:assets
     
     
     5. Please check if Mongo Db is working well in fourth method of "Installation MongoDB".
     5. Please check if Mongo Db is working well in fourth method of "Installation MongoDB".
 
 
+### How to contribution our project.
+    1. Please fork our repository.
+    2. Change your branch to 'developer'.
+    3. Send pull request.
+    
+### How to fill .env file.
+    1. If you clone our repository and downloads required modules, make new '.env' file.
+    2. Fill in the required values as shown below.
+    ![image](/uploads/cbdf2726a8b5c6326378cd5fa8295726/image.png)
     
     
 ### API reference
 ### API reference