Thanks for taking part in this Raspberry Pi and Docker workshop.
If you'd like to continue learning Docker for the Pi and maybe move on to the Raspberry Pi Model 3 (a more powerful version with quad-core processor, 1GB RAM and Ethernet) then check out Docker Captain Alex Ellis' blog series:
After you get home you can continue using your Pi Zero attached to your laptop or a PC with the red OTG cable, or you can purchase a WiFi / Ethernet USB dongle.
If you're using the Pi Zero W (newest edition) you won't need to purchase an additoinal dongle.
Connectivity:
An adapter cable is needed to plug-in USB-A style devices
Power:
If you want to power the Pi up without using an OTG cable then a regular phone charger will be fine if it supplies 1A or greater. If in doubt you can also buy the official Pi adapter:
Stockists:
In the US the best options for purchasing accessories would be Adafruit and Microcenter, but Pimoroni also ships world-wide.