Can i have multiple AP’s of different network on same Unifi Controller

I solved this issue myself. For any having similar issues you should try running the VLANs on a separate physical port -- i.e. separate from your main LAN port. I'm lucky that our gateway/firewall has 6 ports and many are not in use ;)

So, to recap: All the configuration in the above post is correct. All I did was make a new interface on a different physical port (specifically, igb3). This separated my VLANs from my LAN port on igb1. Everything worked as expected after that.

The problem is that the container doesn't know the host's local IP address, so it can't tell the AP what IP address it should use to connect back.

To fix this, you have to manually set the controller IP address in Settings -> Controller -> Controller Hostname/IP and also don't forget to check Override inform host with controller hostname/IP

There is more information about this in the description of the jacobalberty/unifi image, under Adopting Access Points/Switches/Security Gateway.