v1.6.4

What's Changed

• docs: add Railway self-hosting guide by @KMKoushik in #228
• docs: enable Mintlify contextual menu by @KMKoushik in #229
• docs: update railway deploy links by @KMKoushik in #233
• fix callback not working in self-hosted version by @KMKoushik in #234

Full Changelog: v1.6.3...v1.6.4