Improve Dockerfile for better network reliability and enhance README with YouTube authentication troubleshooting

Dockerfile

@@ -2,13 +2,10 @@ FROM python:3.9-slim
 
 WORKDIR /app
 
-# Set DNS to improve network connectivity during build
-# Using Google DNS servers for better reliability
-RUN echo "nameserver 8.8.8.8" > /etc/resolv.conf && \
-    echo "nameserver 8.8.4.4" >> /etc/resolv.conf
-
 # Install system dependencies including ffmpeg for audio processing
-RUN apt-get update && apt-get install -y \
+# Add retry logic and better mirrors for improved network reliability
+RUN apt-get update --allow-releaseinfo-change || (sleep 2 && apt-get update) && \
+    apt-get install -y \
     build-essential \
     curl \
     software-properties-common \
@@ -19,9 +16,15 @@ RUN apt-get update && apt-get install -y \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
+# Set pip to have more retries and timeout
+ENV PIP_DEFAULT_TIMEOUT=100
+ENV PIP_RETRIES=3
+
 # Copy requirements and install Python dependencies
 COPY requirements.txt ./
-RUN pip3 install --no-cache-dir -r requirements.txt
+RUN pip install --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt || \
+    (sleep 2 && pip install --no-cache-dir -r requirements.txt)
 
 # Copy source code
 COPY src/ ./src/

README.md

@@ -38,6 +38,26 @@ This app analyzes a speaker's English accent from video URLs or audio uploads, p
    - Click "Analyze Audio"
    - View the results
 
+### Troubleshooting YouTube Authentication Issues
+
+If you encounter errors like `Sign in to confirm you're not a bot` when using YouTube videos:
+
+1. **Use a different video source**:
+   - Try using Loom, Vimeo, or direct MP4 links instead of YouTube
+
+2. **Using cookies for YouTube authentication**:
+   - The app supports uploading a cookies.txt file for YouTube authentication
+   - You can export cookies from your browser using browser extensions like "Get cookies.txt"
+   - Or use yt-dlp's built-in browser cookie extraction:
+     ```
+     # Install yt-dlp if you don't have it
+     pip install yt-dlp
+     
+     # Extract cookies from your browser (replace chrome with your browser)
+     yt-dlp --cookies-from-browser chrome -o cookies.txt https://youtube.com
+     ```
+   - Upload the generated cookies file in the app interface
+
 ## Technology Stack
 - **Audio Processing**: FFmpeg, Librosa
 - **ML Models**: SpeechBrain, Transformers