I\'d like to use drush. It needs to run in the drupal container. There\'s also a drush docker repo. But I have no clue how to make it available whithin the drupal container. It\
One of the solutions for Drupal 8 - Docker - Drush combo is:
Step: make an alias in your ~/.bashrc file like this:
alias dr5='docker-compose run php5 /root/.composer/vendor/bin/drush --root=/var/www/html/docroot';
In this alias i use the Docker composer but it is the same with simple Docker, you runt the Drush command on the php5 image specifying where your drush is in Docker and where your codebase is on Docker. In this way you just use it like this:
dr5 cr
For the cache rebuild command, in you local code directory.