provide example env file

.env.example

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+# Kinde for secure, fast authentication - https://link.joshtriedcoding.com/kinde
+KINDE_CLIENT_ID=
+KINDE_CLIENT_SECRET=
+KINDE_ISSUER_URL=https://<KINDE-PROJECT-NAME>.kinde.com
+KINDE_SITE_URL=http://localhost:3000
+KINDE_POST_LOGOUT_REDIRECT_URL=http://localhost:3000
+KINDE_POST_LOGIN_REDIRECT_URL=http://localhost:3000/dashboard
+
+# Database for storing everything except PDF files - (Provider up to you, I like PlanetScale)
+DATABASE_URL=
+
+# Uploadthing for storing PDF files - https://uploadthing.com/dashboard
+UPLOADTHING_SECRET=
+UPLOADTHING_APP_ID=
+
+# OpenAI for answering PDF questions - https://platform.openai.com/
+OPENAI_API_KEY=
+
+# Stripe for payment processing - https://stripe.com/
+STRIPE_SECRET_KEY=
+STRIPE_WEBHOOK_SECRET=
+
+# Pinecone for long-term vector storage - https://www.pinecone.io/
+PINECONE_API_KEY=