How to install Google Play or other repo's on Waydroid?

Having just installed waydroid , how is the Google Play Store installed?

$ sudo waydroid shell
/system/bin/sh: No controlling tty: open /dev/tty: No such file or directory
/system/bin/sh: warning: won't have full job control
:/ # whoami
root
:/ # exit

$ waydroid status
Session:	RUNNING
Container:	RUNNING
Vendor type:	MAINLINE
Session user:	nicholas(1000)
Wayland display:	wayland-0

$ waydroid --version
1.3.1

The directions are: waydroid app install xyz.apk Which is easy enough. However, there's no mention per se of installing the Google Play Store and secondary sources would indicate that alternates must be used. Looking to install some sort of repository to pull in mainstream apps like gmail. What repo's can be installed?