Balance always returns $1000

[TyDunn]

The balance should call the bank API and actually tell them their balance, rather than always using a place holder

Example conversations

• http://35.246.182.123/conversations/be0f65c6-228a-4222-ab09-d0e520da0165
• http://35.246.182.123/conversations/917a94ed1b964f8d84f61daff6e441ce

[TyDunn]

Don't forget to push the new image to DockerHub and update the Kubernetes deployment after fixing the custom action!