refactor: readme

README.md

@@ -4,6 +4,12 @@
 
 ## 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
 
@@ -55,6 +61,13 @@ the command explanation
 
 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.
 
+## Contribution
+
+Contributions to Navi are very welcome! If you have a feature request, bug report, or proposal for code refactoring, please feel free to open an issue or submit a pull request.
+
+This thing only supports Gemini for the moment, but it could be easily updated to support other models using Replicate, Ollama, etc. [Pull requests welcome](https://github.com/zeke/yolox/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc)!
+
+
 ## License
 
 MIT