fix build: downgrade to python 3.11 for pandas compatibility

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.13.5-slim
+FROM python:3.11-slim
 
 WORKDIR /app
 
@@ -9,12 +9,13 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt ./
-COPY src/ ./src/
 
-RUN pip3 install -r requirements.txt
+RUN pip3 install --no-cache-dir -r requirements.txt
+
+COPY src/ ./src/
 
 EXPOSE 8501
 
 HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health
 
-ENTRYPOINT ["streamlit", "run", "src/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0"]
+ENTRYPOINT ["streamlit", "run", "src/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0", "--server.headless=true"]

requirements.txt

@@ -1,34 +1,27 @@
-# Reddit Research Dashboard Requirements - 2025
-# Optimized for HuggingFace Spaces Docker deployment
+# Reddit Research Dashboard Requirements
+# Optimized for HuggingFace Spaces with Python 3.11
 
 # Core Streamlit and UI
-streamlit==1.31.0  # Latest stable for 2025
-plotly==5.18.0
-streamlit-extras==0.3.6  # Additional Streamlit components
+streamlit>=1.31.0
+plotly>=5.18.0
+streamlit-extras>=0.3.6
 
-# Data Processing
-pandas==2.1.4
-numpy==1.26.3
-pyarrow==15.0.0  # For efficient data serialization
+# Data Processing (Python 3.11 compatible)
+pandas>=2.2.0
+numpy>=1.26.0
+pyarrow>=15.0.0
 
 # Reddit API
-praw==7.7.1
-
-# Database
-# sqlite3 is built-in, no need to install
+praw>=7.7.1
 
 # Network Analysis
-networkx==3.2.1
-scipy==1.11.4  # For network algorithms
+networkx>=3.2.1
+scipy>=1.11.4
 
 # Utilities
-python-dotenv==1.0.1
-pytz==2024.1
+python-dotenv>=1.0.1
+pytz>=2024.1
 
 # Performance & Caching
-joblib==1.3.2  # For efficient pickling in checkpoints
-lz4==4.3.3  # Compression for cache optimization
-
-# Optional: For enhanced features
-# textblob==0.17.1  # Sentiment analysis
-# wordcloud==1.9.3  # Word cloud generation
+joblib>=1.3.2
+lz4>=4.3.3