Add Proxy Pool service doc to readme

README.md

@@ -18,6 +18,7 @@ A simple scraper for TripAdvisor reviews.
   - [Visit the UI](#visit-the-ui)
   - [Live Demo](#live-demo)
 - [Proxy Pool](#proxy-pool)
+  - [Running the Proxy Pool](#running-the-proxy-pool)
 
 ## How to Install Docker:
 1. [Windows](https://docs.docker.com/desktop/windows/install/)
@@ -87,3 +88,15 @@ The UI is accessible at `http://localhost:3000`.
 A live demo of the container provisioner is available at [https://algo7.tools](https://algo7.tools).
 
 # Proxy Pool
+Proxy Pool is a docker image that runs both HTTP and SOCKS5 Proxies over OpenVPN (config to be provided by the user via docker bind mounts). `sockd`, `squid`, and `openvpn` client are managed by `supervisord` in the container. The service integrates with the Container Provisioner to provide a pool of proxies for the scraper to use. The container provisioner uses `docker-compose labels` to distinguish between different proxies. At this moment, the container provisioner only supports connecting to the Proxy Pool using HTTP proxies. Each service in the `docker-compose.yml` file represents a single proxy in the pool. The `docker-compose.yml` file for the proxy pool is located in the `proxy_pool` folder.
+
+The Proxy Pool service can also be used directly with the scraper. Just make sure that the `PROXY_ADDRESS` environment variable is in the `docker-compose.yml` file for the scraper.
+
+## Running the Proxy Pool
+1. Pull the latest scraper Docker image
+```bash
+docker pull ghcr.io/algo7/tripadvisor-review-scraper/vpn_worker:latest
+```
+2. Create a docker-compose.yml file containing the configurations for each proxy (see the docker-compose.yml provided in the proxy_pool folder).
+3. Place the OpenVPN config file of each proxy in the corresponding bind mount folder speicified in the docker-compose.yml file.
+4. Run `docker-compose up` to start the container.