Integrate dotenv for environment variable management

- Added dotenv support to load environment variables for configuration.
- Removed ICE server configuration from webrtc_streamer, streamlining the setup process.

app.py

@@ -5,7 +5,9 @@ import streamlit as st
 from streamlit_webrtc import webrtc_streamer, WebRtcMode
 from src.opencv_utils import OpenCVUtils
 from utils.turn import get_ice_servers
+from dotenv import load_dotenv
 
+load_dotenv()
 st.set_page_config(page_title="OpenCV Explorer", page_icon="🎨", layout="wide")
 
 
@@ -123,7 +125,6 @@ def video_frame_callback(frame: av.VideoFrame) -> av.VideoFrame:
 webrtc_streamer(
     key="opencv-explorer",
     mode=WebRtcMode.SENDRECV,
-    rrtc_configuration={"iceServers": get_ice_servers()},
     video_frame_callback=video_frame_callback,
     media_stream_constraints={"video": True, "audio": False},
     async_processing=True,