Merge pull request #156 from chomosuke/Atlast-instruction

Update README.md with Atlas instruction

README.md

@@ -1,3 +1,53 @@
+# Setup Atlas database cluster + get the connection string
+
+1. Head over to https://www.mongodb.com/atlas/database
+2. Login to Mongodb Atlas by clicking the sign in button(hilighted in red)
+
+    2.1 Or, create a new account by clicking the try free button(hilighted in blue). Please note that logging in with google account is also available.
+
+![image](https://user-images.githubusercontent.com/88422113/138383783-80346ac2-696d-4061-a0a6-ac5f39d639f1.png)
+
+3. The webpage will be redirected to the home page after signed in
+4. Click on the "Build a Database" button in the middle of the home page, or at the top right of the home page if at least 1 server is existed in the account
+
+![image](https://user-images.githubusercontent.com/88422113/138384417-23c1f4c1-4c86-40fe-abcd-f5fd4feaf697.png)
+
+5. Choose the prefered database plan, server provide, and the server location
+6. Setup the server name in the cloud provider selection page
+
+![image](https://user-images.githubusercontent.com/88422113/138384815-deea28a0-a8da-4ce3-ae31-0bf7c9eb9f96.png)
+
+7. Wait 1-3 minutes while the server is being created
+
+![image](https://user-images.githubusercontent.com/88422113/138384911-b37a5310-ca85-4cb3-a889-d551854e5532.png)
+
+8. Click the "connect" button after the database is generated
+
+![image](https://user-images.githubusercontent.com/88422113/138385396-b9fb81de-8fc2-4736-b909-0d2ae1da1c7b.png)
+
+9. add a connection IP address:
+
+    9.1 click on  the "Add Current IP address" button if the application is going to be hosted by the current device
+
+    9.2 if the application is going to be hosted by the other device, click on  the "Add a Different IP address" and fill in the host device's IP address
+
+10. Create a database user if not existed, then proceed onward by clicking "Choose a connection method"
+
+![image](https://user-images.githubusercontent.com/88422113/138386286-e78fad0c-85a1-47d3-b70e-5151069c7e9c.png)
+
+11. Click on the "Connect your application" button
+
+![image](https://user-images.githubusercontent.com/88422113/138386534-3e2e64dc-d50f-41b2-8c74-59ccb78f4f04.png)
+
+12. make sure the driver is "Node.js" version "4.0 or later"
+13. copy and note down the connection string. Please note that the connection string should start with username:password(created in [10]).
+
+    13.1 eg. if the user name is "Test" and the password is "12345" then the connection string should start with mongodb+srv://Test1:12345@....
+
+![image](https://user-images.githubusercontent.com/88422113/138387413-a8dede3c-b87c-483c-a123-00b5653c3f96.png)
+
+this connection string is required to deploy the application
+
 # Source code
 This subdirectory holds the source code for our CRM.