docs: add getting started

README.md

@@ -1,2 +1,39 @@
 # snipgpt
-A cli to generate short snippets using openai LLM
+
+A CLI to generate short snippets using Openai LLM
+
+### Demo
+
+![snipgpt demo](https://raw.githubusercontent.com/cristianoliveira/snipgpt/main/snipgpt-demo.png)
+
+## Getting started
+
+Clone this repo and install the dependencies.
+
+```bash
+git clone git@github.com:cristianoliveira/snipgpt.git
+cd snipgpt
+npm i
+```
+
+Obtain your OpenAI key following these [instructions](https://help.openai.com/en/articles/4936850-where-do-i-find-my-secret-api-key).
+
+```bash
+cp .env.example .env
+# edit the file with your key
+echo "OPENAI_API_KEY=your-key" > .env
+```
+
+All good. Now run start it:
+
+```bash
+npm start
+```
+
+It will open a prompt where you can request for short snippets. It also works
+for other stuff, for instance, to ask for examples of how to use a given
+command from the coreutils.
+
+## LICENSE
+
+I don't care. AKA: MIT.