docs(presto-clp): Add step about changing database.host to a non-localhost hostname/IP since Presto runs on the Docker rather than host network.

docs/src/user-guide/guides-using-presto.md

@@ -31,8 +31,27 @@ Using Presto with CLP requires:
 
 ### Setting up CLP
 
-Follow the [quick-start](./quick-start/index.md) guide to set up CLP and compress your logs. A
-sample dataset that works well with Presto is [postgresql].
+1. Follow the [quick-start](./quick-start/index.md) guide to download and extract the CLP package.
+Before proceeding, navigate to `etc/clp-config.yml` in the package. Locate and uncomment the
+`database:` section, and change the`database.host` parameter to a non-localhost hostname/IP. The
+`database:` section should look like this:
+
+    ```yaml
+    database:
+      type: "mariadb"  # "mariadb" or "mysql"
+      host: "<new-IP-address>"
+      port: 3306
+      name: "clp-db"
+    ```
+
+    For CLP’s database, `localhost` indicates the host itself, but for the Presto coordinator and
+    worker(s), `localhost` points at the container Presto is running within, as the coordinator and
+    worker(s) run on a kind of virtual network.
+    Infrastructure that will support CLP and the Presto container running within the same network is
+    in development.
+
+2. Continue the [quick-start](./quick-start/index.md#using-clp) guide to start up CLP and compress
+your logs. A sample dataset that works well with Presto is [postgresql].
 
 ### Setting up Presto