fix: don't try to create a new user

Dockerfile

@@ -1,29 +1,29 @@
 FROM node:18-alpine
 
-# Create user with UID 1000 as recommended by Hugging Face Spaces
-RUN adduser -D -u 1000 user || echo "User 1000 likely already exists, continuing..."
-
-# Set up environment variables
-ENV HOME=/home/user \
-    PATH=/home/user/.local/bin:$PATH
-
-# Create and set up app directory with proper permissions
-WORKDIR $HOME/app
+# Use the existing node user (usually UID 1000)
+# Set up environment variables for the node user
+ENV HOME=/home/node \
+    PATH=/home/node/.local/bin:$PATH
+
+# Create and set up app directory owned by node user
+# Go to user's home directory first to ensure it exists
+WORKDIR $HOME
 RUN mkdir -p $HOME/app && \
-    chown -R user:user $HOME/app && \
+    chown -R node:node $HOME/app && \
     chmod -R 755 $HOME/app # Set initial permissions
+WORKDIR $HOME/app # Set the final working directory
 
-# Switch to the user
-USER user
+# Switch to the node user
+USER node
 
-# Copy package files
-COPY --chown=user viewer/package*.json ./
+# Copy package files (owned by node)
+COPY --chown=node:node viewer/package*.json ./
 
 # Install dependencies
 RUN npm install
 
-# Copy the entire viewer directory
-COPY --chown=user viewer/ .
+# Copy the entire viewer directory (owned by node)
+COPY --chown=node:node viewer/ .
 
 # Build the application
 RUN npm run build