Fix Dockerfile for Hugging Face build

Dockerfile

@@ -1,6 +1,6 @@
 FROM node:22-slim
 
-# Install system dependencies for sandbox and database
+# Install system dependencies
 RUN apt-get update && apt-get install -y \
     python3 \
     python3-pip \
@@ -8,29 +8,32 @@ RUN apt-get update && apt-get install -y \
     git \
     && rm -rf /var/lib/apt/lists/*
 
-# Install Python dependencies
+# Install Python dependencies (Chromadb needs some build tools sometimes)
 RUN pip3 install chromadb --break-system-packages
 
 WORKDIR /app
 
-# Copy package files
+# Install pnpm
+RUN npm install -g pnpm
+
+# Copy package files first for better caching
 COPY package.json pnpm-lock.yaml ./
 
-# Install pnpm and dependencies
-RUN npm install -g pnpm && pnpm install
+# Install dependencies
+RUN pnpm install
 
 # Copy all project files
 COPY . .
 
-# Build the frontend
+# Set environment variables for build
+ENV NODE_ENV=production
+ENV PORT=7860
+
+# Build the frontend and backend
 RUN pnpm build
 
-# Expose the port (Hugging Face Spaces default is 7860)
+# Ensure the application starts correctly
 EXPOSE 7860
 
-# Set environment variables
-ENV PORT=7860
-ENV NODE_ENV=production
-
-# Start the application
+# Command to run the app
 CMD ["pnpm", "start"]