Use proper base in links

[rootEnginear]

• Append ${import.meta.env.BASE_URL} to URLs to make it behave correctly on base change (such as in production)
• Use import.meta.env instead of process.env
• Remove <link rel="sitemap" href="/sitemap.xml" /> since there is no sitemap generator

PS: I have tried to specify base in many ways such as '', 'lol', '/lol', 'lol/', '/lol/'. Apparently, all will be transformed into a proper URL, '/' and '/lol/'. So there is no need in using / between import.meta.env.BASE_URL and the path.

[Th1nkK1D]

Thank you Astro god

[Th1nkK1D]

Waitttt, it's broken in staging that is not on the root

[rootEnginear]

*facepalm* I'll look into it rn.