docs: Update server Readme for new Intellij IDEA version (#5576)

Co-authored-by: Ali Zahir <Ali>
Co-authored-by: Arpit Mohan <mohanarpit@users.noreply.github.com>

contributions/ServerSetup.md

@@ -157,8 +157,25 @@ Please note when setting **Working directory** option. If the path is not correc
 3. Load your env file by going to the EnvFile Tab in the Run/Debug configuration settings for your server.
 <img width="1067" alt="Screenshot 2021-03-03 at 1 49 17 PM" src="https://user-images.githubusercontent.com/458946/109775238-451c8d80-7c27-11eb-98ad-61fc33082b63.png">
 
-Happy hacking.
+## Configuration settings for version 2021.1.2 (Community Edition) IntelliJ IDEA
 
-## Need Assistance?
+After configuring settings as mentioned above, please also add the following to your IntelliJ IDEA setup.
+
+1.  [Optional] As shown in the image below, please enable the **Store as Project** checkbox to run the application from the main class specified. 
+<img width="1070" alt="intellij config_1" src="./images/intellij_config_1.png">
+
+2. Please enable the **Always update snapshots** checkbox so that the most recent build is picked up. 
+<img width="1070" alt="intellij config_2" src="./images/intellij_config_2.png"> 
+
+Happy hacking ✌️
+
+#### Note:
+In case the server doesn't work with the above config, please try re-compiling the code using the steps
+
+```sh
+mvn -B clean compile && ./build.sh -DskipTests
+```
+
+## Need Assistance
 - If you are unable to resolve any issue while doing the setup, please feel free to ask questions on our [Discord channel](https://discord.com/invite/rBTTVJp) or initiate a [Github discussion](https://github.com/appsmithorg/appsmith/discussions) or send an email to `support@appsmith.com`. We'll be happy to help you. 
 - In case you notice any discrepancy, please raise an issue on Github and/or send an email to support@appsmith.com.