Use bridge for your dockers. The lease boy one I use with host is Plex.

This is intentional for macvlan networks (what br0 is). By default the host will not be able to connect with any container running on br0 and visa versa. You should ideally run everything you possibly can in bridge mode (or even better in a custom bridge network especially if you're using a reverse proxy, lets you just use host names instead of IPs). That being said if you have a legitimate use for using a macvlan network, you can go into docker settings and change the setting "Host access to custom networks" to enabled