Working with directories in lightsail installation

After an easy installation of openemr-php7_5.0.1-3_all.deb on lightsail, I can’t seem to locate my htdocs/openemr folder. Running “find …” shows docker folders and an unreachable /var/localhost/htdocs.

In addition to enabling multi-site, I need access to rxnorm etc.

Can anyone shed some light on how I should be managing files on this sort of installation?