Update chatbot

config/config.py

@@ -1,7 +1,10 @@
 import os
 from dotenv import load_dotenv
 
-load_dotenv()
+# Use an absolute path so .env is found regardless of the process working
+# directory — under systemd the CWD may not be the project root.
+_here = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+load_dotenv(os.path.join(_here, '.env'))
 
 class Config:
     SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-secret-key-change-in-production'
@@ -44,8 +47,10 @@ class Config:
     MAX_CONTENT_LENGTH = int(os.environ.get('MAX_CONTENT_LENGTH', 16 * 1024 * 1024))
     ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'pdf', 'doc', 'docx', 'txt', 'zip', 'log'}
 
-    # Anthropic AI
-    ANTHROPIC_API_KEY = os.environ.get('ANTHROPIC_API_KEY', '')
+    # AI Chatbot — Groq (free tier: 14,400 req/day, no credit card, no region restrictions)
+    # Get a key at: https://console.groq.com → API Keys
+    GROQ_API_KEY = os.environ.get('GROQ_API_KEY', '')
+    GROQ_MODEL   = os.environ.get('GROQ_MODEL', 'llama-3.3-70b-versatile')
 
     # Rate limiting storage.
     # The `limits` library (used by Flask-Limiter) does not support MySQL as a