Update installation guide

README.md

@@ -13,16 +13,21 @@ $ cllm search "Provide the command to build and push a Docker image from the cur
   docker build -t myapp:latest . --push
 ```
 
-
 ## Installation
 
-`cllm` can be installed using `brew`!
+### Homebrew (macOS and Linux)
 
 ```bash
 brew tap dev-backpack/cllm
 brew install cllm
 ```
 
+### Install Script (macOS and Linux)
+
+```bash
+curl https://raw.githubusercontent.com/dev-backpack/cllm/main/install.sh | sh
+```
+
 ## Commands
 
 #### Register OpenAI API Key
@@ -35,4 +40,4 @@ cllm set key [API_KEY]
 
 ```bash
 cllm search [QUERY]
-```
+```