README changes

.env.example

@@ -11,7 +11,8 @@
 
 # Prisma
 # https://www.prisma.io/docs/reference/database-reference/connection-urls#env
-DATABASE_URL="postgresql://username:password@localhost:5432/prompt-lab?schema=public"
+DATABASE_URL="postgresql://postgres:postgres@localhost:5432/prompt-lab?schema=public"
 
-# OpenAI
+# OpenAI API key. Instructions on generating a key can be found here:
+# https://help.openai.com/en/articles/4936850-where-do-i-find-my-secret-api-key
 OPENAI_API_KEY=""