It would be nice to add an example of Testcontainers.exposeHostPorts method. It is very helpful when you're running something inside a container but want to access a port from the host.

Let's say:

1. start a very simple Spring Boot app in the test with some HTML page
2. use Testcontainers.exposeHostPorts(serverPort) to expose it to the containers network.
3. start BrowserWebDriverContainer
4. run some very simple Selenium assertion of the HTML page

Here is a test for the feature:
https://github.com/testcontainers/testcontainers-java/blob/bcecd5cd9f9325517fd45db585312df2624315bb/core/src/test/java/org/testcontainers/containers/ExposedHostTest.java