Update Dockerfile

Dockerfile

@@ -1,34 +1,26 @@
 # Use Python 3.11 (to match your local environment)
 FROM python:3.11-slim
 
-# Set the working directory to /app
 WORKDIR /app
 
-# Install system dependencies (needed for compiling packages like flashrank)
+# Install build tools
 RUN apt-get update && apt-get install -y \
     build-essential \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy requirements first to cache dependencies
 COPY requirements.txt .
-
-# Install Python dependencies
-# --no-cache-dir keeps the image size smaller
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Copy all your code (app_1.py, src/, templates/, etc.) into the container
 COPY . .
 
-# Create writable directories for the database and file uploads
-# The 'chmod -R 777' gives the container permission to write here
+# --- HERE IS THE FIX ---
+# Create writable directories for the database, uploads, AND sessions
 RUN mkdir -p /app/chroma_db && chmod -R 777 /app/chroma_db
 RUN mkdir -p /app/Uploads && chmod -R 777 /app/Uploads
+RUN mkdir -p /app/flask_session && chmod -R 777 /app/flask_session
+# -----------------------
 
-# Tell Docker that the container will listen on port 7860
 EXPOSE 7860
 
-# --- The Command to Run Your App ---
-# We use Gunicorn, a production-grade server
-# It looks for the 'app_1.py' file and the 'app' object inside it
-# --timeout 300 gives your RAG system 5 minutes to respond before timing out
+# Point to app_1.py
 CMD ["gunicorn", "-b", "0.0.0.0:7860", "app:app", "--timeout", "300"]