fix: use built-in node user instead of creating new one

Dockerfile

@@ -13,23 +13,22 @@ RUN apt-get update && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# Add user 1000 for Hugging Face Spaces
-RUN useradd -m -u 1000 user
-USER user
-ENV HOME=/home/user \
-    PATH=/home/user/.local/bin:$PATH
+# The official Node image already has a user 'node' with UID 1000
+USER node
+ENV HOME=/home/node \
+    PATH=/home/node/.local/bin:$PATH
 
 # Set the working directory in the container
 WORKDIR $HOME/app
 
 # Copy package.json and package-lock.json with correct permissions
-COPY --chown=user package*.json ./
+COPY --chown=node package*.json ./
 
 # Install dependencies
 RUN npm install
 
 # Copy the rest of the application code with correct permissions
-COPY --chown=user . .
+COPY --chown=node . .
 
 # Build the frontend (Vite)
 RUN npm run build