[Updated] README.md

Author: harshau007

README.md

@@ -105,14 +105,43 @@ Packages in TCET Linux is managed by package manager.
 
 ## How to build ISO
 
-### 1. Build
+### 1. Clone repository
 ```bash
 git clone https://github.com/tcet-opensource/tcet-linux.git
+```
+
+### 2. Setup Keys
+```bash
+# Akash Dubey (Shut in arch linux guy)
+sudo pacman-key --keyserver keyserver.ubuntu.com -r 280178FA27665D44
+sudo pacman-key --lsign-key 280178FA27665D44
+
+# Rishabh Jha (Neovim lober)
+sudo pacman-key --keyserver keyserver.ubuntu.com -r 421FFABA41F36DA5
+sudo pacman-key --lsign-key 421FFABA41F36DA5
+
+# Atharva Vartak (Technical head)
+sudo pacman-key --keyserver keyserver.ubuntu.com -r 02F660CD5FA77EBB
+sudo pacman-key --lsign-key 02F660CD5FA77EBB
+
+# Harsh Upadhyay (kya likhu?)
+sudo pacman-key --keyserver keyserver.ubuntu.com -r BF4E1E687DD0A534
+sudo pacman-key --lsign-key BF4E1E687DD0A534
+```
+
+### 3. Build
+```bash
+# Using build script
+cd tcet-linux
+./buildiso # Uses tcet-linux-keyring package
+```
+OR
+```bash
 cd tcet-linux
-./buildiso
+sudo mkarchiso -v . # Uses keyring from keyserver
 ```
 
-### 2. ISO will appear in `work/out/` directory
+### 4. ISO will appear in `work/out/` directory
 <br />
 
 ## Important Links: