Add entry point section to routing docs

[iagobruno]

Please revise the text, English is not my native language.

Closes #105

[codesandbox-ci[bot]]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit c64862a881be0975a76ba38da4714ee8baa6d82a:

Sandbox	Source
charming-visvesvaraya-qzzh3	Configuration

[asadm]

Thanks, I will make corrections and merge in a bit.