feat: Load environment variables at the start of the application

_app.py

@@ -1,6 +1,9 @@
 import gradio as gr
 from gradio_pdf import PDF
 from pdf_text_extractor import PDFTextExtractor
+from dotenv import load_dotenv
+
+load_dotenv()
 
 def main():
     """Main function to create and launch the interface."""