docs: 📝 Update env var and write Configuration doc

apps/builder/.env.local.example

@@ -1,60 +1,14 @@
 DATABASE_URL=postgresql://postgres:@localhost:5432/typebot
-
-ENCRYPTION_SECRET=q3t6v9y$B&E)H@McQfTjWnZr4u7x!z%C #256-bits secret (can be generated here: https://www.allkeysgenerator.com/Random/Security-Encryption-Key-Generator.aspx)
+ENCRYPTION_SECRET=SgVkYp2s5v8y/B?E(H+MbQeThWmZq4t6 #256-bits secret (can be generated here: https://www.allkeysgenerator.com/Random/Security-Encryption-Key-Generator.aspx)
 NEXTAUTH_URL=http://localhost:3000
+NEXT_PUBLIC_VIEWER_URL=http://localhost:3001
 
-# Used for email auth and email notifications
-AUTH_EMAIL_SERVER_USERNAME=username
-AUTH_EMAIL_SERVER_PASSWORD=password
-AUTH_EMAIL_SERVER_HOST=smtp.example.com
-AUTH_EMAIL_SERVER_PORT=587
-AUTH_EMAIL_FROM_EMAIL=noreply@example.com
-AUTH_EMAIL_FROM_NAME="John Smith"
-
-NEXT_PUBLIC_EMAIL_NOTIFICATIONS_FROM_EMAIL=
-
-# Storage
-# Used for uploading images, videos, etc...
 S3_ACCESS_KEY=minio
 S3_SECRET_KEY=minio123
 S3_BUCKET=typebot
 S3_PORT=9000
 S3_ENDPOINT=localhost
 S3_SSL=false
-# S3_REGION=
 
-# Auth
-# (Optional) Used to login using GitHub
-GITHUB_CLIENT_ID=
-GITHUB_CLIENT_SECRET=
-
-# (Optional) Used to login using Google AND Google Sheets integration
-GOOGLE_CLIENT_ID=
-GOOGLE_CLIENT_SECRET=
-
-# (Optional) Used to login using Facebook
-FACEBOOK_CLIENT_ID=
-FACEBOOK_CLIENT_SECRET=
-
-# (Optional) Subscription Payment
-NEXT_PUBLIC_STRIPE_PUBLIC_KEY=
-STRIPE_SECRET_KEY=
-STRIPE_PRICE_USD_ID=
-STRIPE_PRICE_EUR_ID=
-STRIPE_WEBHOOK_SECRET=
-
-# (Optional) Used for GIF search
-NEXT_PUBLIC_GIPHY_API_KEY=
-
-NEXT_PUBLIC_VIEWER_HOST=http://localhost:3001
-
-# (Optional) Error tracking with Sentry
-NEXT_PUBLIC_SENTRY_DSN=
-SENTRY_AUTH_TOKEN=
-SENTRY_PROJECT=
-SENTRY_ORG=
-
-# Vercel
-VERCEL_TOKEN=
-VERCEL_VIEWER_PROJECT_NAME=
-VERCEL_TEAM_ID=
+# For more configuration options check out:
+https://docs.typebot.io/self-hosting/configuration