docs: updated readme

README.md

@@ -1,8 +1,35 @@
 # GTTP CLI
 
-GTTP is an interactive Go Text Template Parser. It allows you to write text templates, that you can interactively fill out.
+GTTP is an interactive Go Text Template Parser. It allows you to write text templates, that you can interactively fill
+out.
 
 ## Installation
 
+There are multiple ways to install `gttp` on your system.
+
+### Install using Go
+
+If you have [Go](https://go.dev) installed, you can install `gttp` using the following command:
+
+```bash
+go install github.com/gttp-cli/gttp@latest
+```
+
+### Install Using Web Installer
+
+You can install `gttp` using [instl](https://instl.sh).
+Using instl is the simplest way to install `gttp` on your system.
+
+Just copy the following command and paste it into your terminal:
+
+| Operating System | Command                                      |
+|------------------|----------------------------------------------|
+| macOS            | <code>curl -sSL instl.sh/gttp-cli/gttp/macos | bash</code>|
+| Windows          | <code>iwr instl.sh/gttp-cli/gttp/windows     | iex</code>|
+| Linux            | <code>curl -sSL instl.sh/gttp-cli/gttp/linux | bash</code>|
+
+> [!TIP]
+> If you want to take a look at the script before running it, you can open the instl.sh URL in your browser.
+
 ## Docs