Update Dockerfile

Dockerfile

@@ -2,16 +2,21 @@ FROM node:18
 
 WORKDIR /app
 
-COPY package*.json ./
+# Copy package files first and install deps (cache efficiency)
+COPY package.json package-lock.json* ./
 RUN npm install
 
+# Copy all app source
 COPY . .
 
-# Make sure /app is writable for Vite cache files
-RUN chmod -R a+w /app
+# Fix permissions so Vite can write temp files
+RUN chown -R node:node /app
 
-ENV VITE_CACHE_DIR=/tmp/vite
+# Run as non-root node user
+USER node
 
+# Expose port 7860
 EXPOSE 7860
 
-CMD ["npm", "run", "dev", "--", "--host", "0.0.0.0", "--port", "7860"]
+# Run dev server on HF Spaces port and host
+CMD ["npm", "run", "dev"]