Unable to add passkeys on selfhosted instance

(#584) Bug Fixed security self-hosting

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Comment by @Speykious
RexSystem 1 vote originally by @Speykious on GitHub
For anyone who wants the fix for this, you need to add this env variable in docker-compose.yaml:
FLUXER_PASSKEY_RP_NAME: ${FLUXER_PASSKEY_RP_NAME:-Fluxer}
FLUXER_PASSKEY_RP_ID: ${FLUXER_PASSKEY_RP_ID:-fluxer.app}
Note
(the Fluxer and fluxer.app values are just default values, you can set them to anything you want.)
Then, in .env, you can set FLUXER_PASSKEY_RP_NAME to whatever name you want and FLUXER_PASSKEY_RP_ID to your instance domain.