@siege801, I have a similar problem than you. I commented the post from which you got your information ( Setting up a Joplin Server on Docker). I think he did not include steps to create a SSL certificate. I tried to do so as explain in step 6 of Guide for Joplin-Server on Raspberry Pi but it did not change anything for me. I was just able to configure apache with there but not joplin server yet. I think that some conf is needed in /etc/apache2/sites-available/000-default-le-ssl.conf for joplin but this may not have any relation with your problem.