Clarify supergraph build workflow including common pitfalls (#714)

docs/getting-started/build/04-build-your-api.mdx

@@ -41,25 +41,28 @@ a GraphQL query on your API using any models you've added.
 
 ### Step 1. Create a supergraph build
 
-```bash title="Run the following command, updating the referenced paths to match your directory structure:"
+```bash title="Run:"
 ddn supergraph build local
 ```
 
 This will create a build of your supergraph located in the `/engine/build` directory.
 
-:::tip Start your engines!
+### Step 2. Start your engines!
 
-Want to test your supergraph? Make sure that your services are still up and running with the following command.
+If you are already running this command, first stop the command with `CTRL+C`. Then run the command to start the connector and engine services with the updated configurations.
 
 ```bash title="Run:"
 ddn run docker-start
 ```
 
-**If you haven't [included your connector(s)](/getting-started/build/03-connect-to-data/01-connect-a-source.mdx) in your
-`compose.yaml`, don't forget to start it as well.**
+:::tip Port conflicts?
+
+Stop any previously running `ddn run docker-start` commands in your terminal. Existing running servers can conflict with the ports needed. In particular, engine always starts on port 3000.
 
 :::
 
+### Step 3. Launch the Hasura console
+
 You can check out your local API by launching the Hasura console using the CLI.
 
 ```bash title="Run:"
@@ -77,7 +80,7 @@ browsers for the best experience with the Hasura Console including for local dev
 
 :::
 
-### Step 2. Write your first query
+### Step 4. Write your first query
 
 Use the GraphiQL explorer to either write a query or construct it using the menu on the left-hand side of the console.
 When you're ready, hit the run button to execute your query.
@@ -92,8 +95,7 @@ query MyFirstQuery {
 }
 ```
 
-All types are namespaced with the subgraph to which they belong. Here, you can see that `carts` belongs to a subgraph
-named `my_subgraph`. Thus, the query above will return a response that looks like this:
+The above query will return a response that looks like this:
 
 ![Simple query with carts](/img/get-started/beta/console_simple-carts-query.png)