Add requirements.txt with essential dependencies for the project

app/config.py

@@ -0,0 +1,12 @@
+from pydantic_settings import BaseSettings
+from typing import Optional
+
+class Settings(BaseSettings):
+    database_url: Optional[str] = None
+    secret_key: Optional[str] = None
+    api_key: Optional[str] = None
+    GROQ_API_KEY: str
+    class Config:
+        env_file = ".env"
+
+settings = Settings()