Update app.py

app.py

@@ -35,7 +35,7 @@ REPORTS_ROOT = Path(os.getenv("REPORTS_ROOT", "reports")).resolve()   # e.g. /ap
 SSRI_FILE = Path(os.getenv("SSRI_FILE", "app/medicationCategories/SSRI_list.txt")).resolve()
 MISC_FILE = Path(os.getenv("MISC_FILE", "app/medicationCategories/MISC_list.txt")).resolve()
 GROQ_API_KEY = os.getenv("GROQ_API_KEY", None)
-
+ALLOWED_EXTENSIONS = {"pdf"}
 # --- LLM setup -------------------------------------------------------------
 llm = ChatGroq(
     model=os.getenv("LLM_MODEL", "meta-llama/llama-4-scout-17b-16e-instruct"),