update readme

README.md

@@ -4,3 +4,30 @@
 paste is a simple, "code friendly" web frontend for [bytebin](https://github.com/lucko/bytebin).
 
 It is written in React using [react-simple-code-editor](https://github.com/satya164/react-simple-code-editor) and [Prism](https://github.com/PrismJS/prism).
+
+### Usage
+I host a public instance of paste at [paste.lucko.me](https://paste.lucko.me).
+
+Please feel free to use it to share code/configs/whatever! However note the (very-non-legally worded) [terms of service](https://github.com/lucko/bytebin#public-instances) for bytebin apply.
+
+If you come across any content which is illegal or infringes on copyright, please [get in touch](https://lucko.me/contact) and let me know so I can remove it.
+
+Uploaded content is retained for 30 days then deleted.
+
+### Host your own
+If you want to host your own paste:
+
+```bash
+git clone https://github.com/lucko/paste
+yarn install
+
+yarn start # to start a dev instance locally
+yarn build # to build for production
+```
+
+### API
+paste uses [bytebin](https://github.com/lucko/bytebin) for data storage.
+
+As a result, you can use the [bytebin API](https://github.com/lucko/bytebin#api-usage) to submit/read content programatically.
+
+To set the language of a paste, use the `Content-Type` header with value `text/<language>` (e.g. `Content-Type: text/yaml` for a .yml file).