Add backend pipeline Dockerfile with lightweight deps

backend/Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system dependencies for newspaper3k and psycopg2
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    libxml2-dev \
+    libxslt1-dev \
+    libjpeg-dev \
+    zlib1g-dev \
+    libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY requirements-pipeline.txt ./requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Download NLTK data needed by newspaper3k
+RUN python -c "import nltk; nltk.download('punkt_tab', quiet=True)"
+
+# Copy application code
+COPY . .
+
+CMD ["python", "run_pipeline.py"]

backend/requirements-pipeline.txt

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+# Burmddit Pipeline - Lightweight requirements (no PyTorch/Scrapy)
+
+# Web scraping
+beautifulsoup4==4.12.3
+requests==2.31.0
+feedparser==6.0.11
+newspaper3k==0.2.8
+
+# Database
+psycopg2-binary==2.9.9
+
+# AI (Claude for translation/compilation)
+anthropic==0.18.1
+
+# Text processing
+scikit-learn==1.4.0
+python-slugify==8.0.2
+markdown==3.5.2
+bleach==6.1.0
+
+# Utilities
+python-dotenv==1.0.1
+python-dateutil==2.8.2
+pytz==2024.1
+pyyaml==6.0.1
+
+# Logging
+loguru==0.7.2