docs: start smoothing out proxy docs

website/docs/how-to/how-to-run-the-unleash-proxy.mdx

@@ -2,7 +2,7 @@
 title: How to run the Unleash Proxy
 ---
 
-The [Unleash Proxy](../sdks/unleash-proxy.md) provides a way for you to consume feature toggles in front-end clients, such as the [JavaScript Proxy client](../sdks/proxy-javascript.md) and [React Proxy client](../sdks/proxy-react.md).
+The [Unleash Proxy](../sdks/unleash-proxy.md) provides a way for you to consume feature toggles in [front-end clients](../sdks/index.md#front-end-sdks), such as the [JavaScript Proxy client](../sdks/proxy-javascript.md) and [React Proxy client](../sdks/proxy-react.md).
 
 Depending on your setup, the Proxy is most easily run in one of two ways, depending on your situation:
 - Run the proxy via Docker
@@ -14,19 +14,22 @@ If you're using a hosted version of Unleash, we can also run the proxy for you i
 
 This is what you need to do before you can run the proxy
 
-- an unleash server to connect to
-- a client API token for the proxy to use
+- A running Unleash server to connect to
+- A client API token for the proxy to use.
+- if you're running the Proxy via Docker: [the `docker` command line tool](https://www.docker.com/)
+- If you're running the Proxy as a Node.js app: [Node.js and its command line tools](https://nodejs.org/).
 
 ## How to run the Proxy via Docker
 
 The easiest way to run Unleash is via Docker. We have published a [docker image on docker hub](https://hub.docker.com/r/unleashorg/unleash-proxy).
 
-1. **Pull the Proxy image**
+### 1. Pull the Proxy image
+
    ```bash
    docker pull unleashorg/unleash-proxy
    ```
 
-2. **Start the proxy**
+### 2. Start the proxy
 
    ```bash
    docker run \
@@ -37,7 +40,7 @@ The easiest way to run Unleash is via Docker. We have published a [docker image
       unleashorg/unleash-proxy
    ```
 
-    You should see the following output:
+You should see the following output:
 
    ```bash
    Unleash-proxy is listening on port 3000!
@@ -47,12 +50,16 @@ The easiest way to run Unleash is via Docker. We have published a [docker image
 
 To run the Proxy via Node.js, you'll have to create your own Node.js project and use the Unleash Proxy as a dependency. Assuming you've already set up your project, here's the steps to take to start the proxy as part of your app:
 
-1. **Install the Unleash Proxy package**
+### 1. Install the Unleash Proxy package
+
    ``` shell npm2yarn
    npm install @unleash/proxy
    ```
 
-2. **Initialize and start the proxy in your code.** A fully working sample app that uses the proxy:
+### 2. Initialize and start the proxy in your code.
+
+A fully working sample app that uses the proxy:
+
    ``` js
    const port = 3000;
 
@@ -78,24 +85,4 @@ In order to verify the proxy you can use curl and see that you get a few evaluat
 curl http://localhost:3000/proxy -H "Authorization: some-secret"
 ```
 
-The output is of the form described in the [payload section](#payload).
-
-## Health endpoint
-
-The proxy will try to synchronize with the Unleash API at startup, until it has successfully done that the proxy will return `HTTP 503 - Not Read?` for all request. You can use the health endpoint to validate that the proxy is ready to recieve requests:
-
-```bash
-curl http://localhost:3000/proxy/health -I
-```
-
-```bash
-HTTP/1.1 200 OK
-Access-Control-Allow-Origin: *
-Access-Control-Expose-Headers: ETag
-Content-Type: text/html; charset=utf-8
-Content-Length: 2
-ETag: W/"2-eoX0dku9ba8cNUXvu/DyeabcC+s"
-Date: Fri, 04 Jun 2021 10:38:27 GMT
-Connection: keep-alive
-Keep-Alive: timeout=5
-```
+Check the reference docs for API return values