Starting with a basic file cannot execute

[vinyll]

Create an index.php file with the following

<php
echo "Hey!";
?>

Start the docker and open the webrowser at https://localhost, accept "the risk".

The following message occurs:

Warning: Unknown: Failed to open stream: No such file or directory in Unknown on line 0
Fatal error: Failed opening required '/app/public/index.php' (include_path='.:/usr/local/lib/php') in Unknown on line 0

[vinyll]

Nevermind, the filename didn't match.

Also not sure how to run the equivalent of an httpaccess with modrewrite, but that's another topic.