update readme

README.md

@@ -1,7 +1,5 @@
 # sharp-image-proxy
 
-[![Run on Google Cloud](https://storage.googleapis.com/cloudrun/button.svg)](https://console.cloud.google.com/cloudshell/editor?shellonly=true&cloudshell_image=gcr.io/cloudrun/button&cloudshell_git_repo=https://github.com/adamlacombe/sharp-image-proxy)
-
 An on the fly image optimization microservice. 
 
 I'm using this to dynamically resize, compress and serve images on my [blog](https://adamlacombe.com/blog/how-to-convert-images-to-avif-in-nodejs?utm_source=github&utm_medium=repo_readme). 
@@ -10,11 +8,6 @@ It's hosted on [Google Cloud Run](https://cloud.google.com/run) behind [Cloudfla
 
 ![Screenshot from 2020-09-09 19-18-19](https://user-images.githubusercontent.com/2395597/92591864-3df87080-f2d1-11ea-80ed-1fab70a4bbc9.png)
 
-
-## Features
-- Resize images proportionally.
-- Support for webp, avif, png, jpeg and tiff.
-
 ## Run using Docker
 ```bash
 docker run \
@@ -23,3 +16,23 @@ docker run \
   --name sharp-image-proxy \
   docker.pkg.github.com/adamlacombe/sharp-image-proxy/sharp-image-proxy:latest
 ```
+
+## Features
+- Resize images proportionally.
+- Support for webp, avif, png, jpeg and tiff.
+
+## Options
+- url
+- width
+- height
+- format = `webp` | `avif` | `png` | `jpeg` | `tiff`
+- quality = `1` - `100` (default `80`)
+
+## Example requests
+- `/?url=https://via.placeholder.com/500&width=300`
+- `/?url=https://via.placeholder.com/500&width=300&format=webp`
+- `/?url=https://via.placeholder.com/500&width=300&format=webp&quality=50`
+- `/?url=https://via.placeholder.com/500&width=300&format=avif&quality=30`
+
+
+[![Run on Google Cloud](https://storage.googleapis.com/cloudrun/button.svg)](https://console.cloud.google.com/cloudshell/editor?shellonly=true&cloudshell_image=gcr.io/cloudrun/button&cloudshell_git_repo=https://github.com/adamlacombe/sharp-image-proxy)