v4.0: Dockerfile includes shared modules from root

api/Dockerfile

@@ -2,10 +2,16 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-COPY requirements.txt .
+# Install api dependencies
+COPY api/requirements.txt ./requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY . .
+# Copy shared modules from root (needed by api/main.py)
+COPY app.py compare.py compliance.py obligations.py ./
+COPY ocr_engine.py chatbot.py redlining.py ./
+
+# Copy api files
+COPY api/ ./
 
 EXPOSE 8000