refactor readme

README.md

@@ -4,12 +4,6 @@
 
 ## Usage
 
-Before using Navi, you need to set your Gemini API key as an environment variable in your shell:
-
-```shell
-export GEMINI_API_KEY="..."
-```
-
 ```shell
 Navi - Your AI-powered Shell Guide
 
@@ -57,6 +51,19 @@ $ Explanation >>
 the command explanation
 ```
 
+## Installation
+
+You can install Navi using the `go get` command:
+
+```shell
+go install github.com/nitintf/navi
+```
+
+After installation, don't forget to export your Gemini API key:
+```shell
+export GEMINI_API_KEY="..."
+```
+
 ## Caution
 
 While Navi uses AI to generate shell commands, it's important to understand that AI isn't perfect. Always review the generated commands before executing them, especially if you're working in a production environment or dealing with sensitive data. Navi is a tool designed to assist you, but it doesn't replace good judgment and understanding of shell commands.