fix: install dependencies as root then chown to bun user

Dockerfile

@@ -1,25 +1,23 @@
 # Use official Bun image
 FROM oven/bun:1-alpine AS base
 
-# The bun image already has a user with UID 1000 (bun user)
-# Switch to that user for HF Spaces compatibility
-USER bun
-
-# Set environment
-ENV HOME=/home/bun \
-    PATH=/home/bun/.local/bin:$PATH
-
-# Set working directory
-WORKDIR $HOME/app
+# Set working directory and ensure bun user owns it
+WORKDIR /home/bun/app
 
-# Copy package files first for better caching
-COPY --chown=bun package.json bun.lockb ./
+# Copy package files first for better caching (as root for now)
+COPY package.json bun.lockb ./
 
-# Install dependencies
+# Install dependencies as root (to avoid permission issues)
 RUN bun install --frozen-lockfile --production
 
 # Copy application files
-COPY --chown=bun . .
+COPY . .
+
+# Change ownership to bun user (UID 1000 for HF Spaces)
+RUN chown -R bun:bun /home/bun/app
+
+# Switch to bun user
+USER bun
 
 # Expose port 7860 (Hugging Face Spaces default)
 EXPOSE 7860