I followed all instructions and got the code for yml file here:

https://github.com/wodby/docker4drupal/blob/master/docker-compose.yml#L4 

I commented out line 33:

image: wodby/drupal:7-5.6-3.3.2 

Then I tried to install on:

  http://drupal.docker.localhost:8000/core/install.php 

Then I got this errors:

  Parse error: syntax error, unexpected ':', expecting ';' or '{' in /var/www/html/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/AnnotationRegistry.php on line 50 

Drupal 8 install works fine, but I need this for Drupal 7 what am I doing wrong?

And are there any other yml files I can use that has D7, php and Sql all ready to go in a consolidated container like the wodby docker4drupal?