Updated documentation

README.md

@@ -25,6 +25,7 @@ ktor:
     modules:
       -codes.kalar.ApplicationKt.module
   deployment:
+    host: <host address> (defaults to `0.0.0.0` if not added)
     port: 8080
 postgres:
   url: "jdbc:postgresql://<url to database>"
@@ -53,3 +54,5 @@ If the server starts successfully, you'll see the following output:
 ```
 
 From here, navigate to http://0.0.0.0:8080/swagger for API documentation.
+
+NOTE: the address may change if you have updated the application.yaml file with a new host address.