Wider null check for giftCrateTemplate

[yoganlava]

giftCrateTemplate can undefined and is checked if it === null.
This is not true, this commit uses a better null check.

Hopefully closes #260

Summary

Describe your changes here. Remove any inapplicable sections.

Server changes (config/, server/, worker/, etc.):

• Better null check for giftCrateTemplate

Testing

Have you tested your changes in the following scenarios?
Feel free to check off scenarios which don't apply.

• Starting backend services locally with docker compose up succeeds.
• I am able to create a new user and log in locally.
• I am able to complete a practice game locally.
• I am able to complete a purchase of Orbs, etc.