docs: Add Linux MailHog install commands (#16366)

CONTRIBUTING.md

@@ -165,7 +165,7 @@ You should have [ESLint running in your editor](http://eslint.org/docs/user-guid
 
 ### Set Up MailHog
 
-To be able to log in, you need to set up MailHog. MailHod is a local SMTP mail server that will catch the emails your freeCodeCamp instance is sending. How you install MailHog is dependent upon your OS. 
+To be able to log in, you need to set up MailHog. MailHog is a local SMTP mail server that will catch the emails your freeCodeCamp instance is sending. How you install MailHog is dependent upon your OS. 
 
 #### macOS
 
@@ -184,6 +184,35 @@ Once it finishes downloading, click on the file. You will probably get a Windows
 
 To close MailHog, close the command prompt. To run it again, click on the same .exe file. You don't need to download a new one.
 
+#### Linux
+
+First install Go.
+
+For Debian-based systems like Ubuntu and Linux Mint, run:
+
+```bash
+sudo apt-get install golang
+```
+
+For CentOS, Fedora, Red Hat Linux, and other RPM-based systems, run:
+
+```bash
+sudo dnf install golang
+```
+
+Or:
+
+```bash
+sudo yum install golang
+```
+
+Then install and run MailHog:
+
+```bash
+go get github.com/mailhog/MailHog
+MailHog
+```
+
 To access your MailHog inbox, open your browser and navigate to [http://localhost:8025](http://localhost:8025). For any other questions related to MailHog or for instructions on custom configurations, check out the [MailHog](https://github.com/mailhog/MailHog) repository.
 
 ### Set Up freeCodeCamp