Migrate to python logging module with env var control.

backend/main.py

@@ -4,6 +4,7 @@ import markdown
 import time
 import os
 import sys
+import logging
 import requests
 
 from fastapi import FastAPI, Request, Depends, status
@@ -38,9 +39,14 @@ from config import (
     FRONTEND_BUILD_DIR,
     MODEL_FILTER_ENABLED,
     MODEL_FILTER_LIST,
+    GLOBAL_LOG_LEVEL,
+    SRC_LOG_LEVELS,
 )
 from constants import ERROR_MESSAGES
 
+logging.basicConfig(stream=sys.stdout, level=GLOBAL_LOG_LEVEL)
+log = logging.getLogger(__name__)
+log.setLevel(SRC_LOG_LEVELS["MAIN"])
 
 class SPAStaticFiles(StaticFiles):
     async def get_response(self, path: str, scope):
@@ -66,7 +72,7 @@ class RAGMiddleware(BaseHTTPMiddleware):
         if request.method == "POST" and (
             "/api/chat" in request.url.path or "/chat/completions" in request.url.path
         ):
-            print(request.url.path)
+            log.debug(f"request.url.path: {request.url.path}")
 
             # Read the original request body
             body = await request.body()
@@ -89,7 +95,7 @@ class RAGMiddleware(BaseHTTPMiddleware):
                 )
                 del data["docs"]
 
-                print(data["messages"])
+                log.debug(f"data['messages']: {data['messages']}")
 
             modified_body_bytes = json.dumps(data).encode("utf-8")