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@@ -1,43 +1,44 @@
 # ── Build Stage ─────────────────────────────────────────────────────────────
-FROM node:20-slim AS builder
+# Use full node image for building to ensure all C++ tools and libs are available
+FROM node:20-bookworm AS builder
 
 WORKDIR /app
 
-# Install build tools for native modules (sharp, tfjs-node)
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    python3 \
-    make \
-    g++ \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install all dependencies (including optional tfjs-node)
+# Copy dependency manifests
 COPY package*.json ./
-RUN npm ci
 
-# Copy source and build static frontend
+# Install all dependencies (including optional tfjs-node and devDeps for build)
+# We use --legacy-peer-deps to avoid strict version conflicts on different OS environments
+RUN npm ci --legacy-peer-deps
+
+# Copy source code
 COPY . .
-RUN npm run build
 
-# Prune devDeps (keeps production node_modules and native binaries)
+# Build static frontend
+# We set CI=false to prevent warnings from being treated as errors
+RUN CI=false npm run build
+
+# Prune dev dependencies to reduce image size
 RUN npm prune --omit=dev
 
 # ── Runtime Stage ───────────────────────────────────────────────────────────
+# Use slim for a smaller runtime footprint
 FROM node:20-slim
 
 WORKDIR /app
 
-# Runtime dependencies for sharp/tensorflow
+# Install basic runtime dependencies (if needed by native modules)
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    libvips-dev \
+    ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy only what's needed from builder
+# Copy build artifacts and production node_modules from builder
 COPY --from=builder /app/dist ./dist
 COPY --from=builder /app/package*.json ./
 COPY --from=builder /app/node_modules ./node_modules
 COPY --from=builder /app/server ./server
 
-# Ensure upload directory remains writable
+# Create and set permissions for uploads directory
 RUN mkdir -p server/uploads && chmod 777 server/uploads
 
 # Env configuration for Hugging Face Spaces
@@ -45,9 +46,10 @@ ENV NODE_ENV=production
 ENV PORT=7860
 EXPOSE 7860
 
-# Non-root security
-RUN groupadd -r appgroup && useradd -r -g appgroup appuser
-RUN chown -R appuser:appgroup /app
+# Non-root security (Hugging Face compatible)
+RUN useradd -m -u 1000 appuser
+RUN chown -R appuser:appuser /app
 USER appuser
 
+# Start the application
 CMD ["node", "server/index.js"]