handling private key new line issue more robustly

[Ran Ding]

We can replace the \\n to actual new line (so ppl don't have to remember manually adding new line in vercel)

privateKey: process.env.FIREBASE_PRIVATE_KEY.replace(/\\n/g, '\n'),

fastfeedback/lib/firebase-admin.js

Line 8 in dad9ad4

 project_id: process.env.NEXT_PUBLIC_FIREBASE_PROJECT_ID 

[Jay Gurav]

yep yep!!, this is the easiest go to for multi-line environment variables, resolved the same issue in my deployment yesterday 👍