chore: now hot.opensauced.pizza/* redirects to app.opensauced.pizza/explore

[nickytonline]

Description

Now hot.opensauced.pizza/* links redirects to app.opensauced.pizza/explore. Once this is deployed to production, we can change whhich app hot.opensauced.pizza points to in the Netlify dashboard.

Related Tickets & Documents

Closes #4142

Mobile & Desktop Screenshots/Recordings

Steps to QA

1. This can't be tested until the redirect in this PR is in production.

Tier (staff will fill in)

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