docs: refresh project structure notes

Dockerfile

@@ -27,7 +27,7 @@ FROM node:20-slim AS runner
 LABEL maintainer="La Fabrik Durable"
 LABEL description="Secure GLTF upload interface with Draco compression and GitHub push"
 
-# Install Blender (headless) + runtime helpers
+# Blender is required for server-side Draco GLB export.
 RUN apt-get update && apt-get install -y --no-install-recommends \
     blender \
     tini \
@@ -41,18 +41,14 @@ ENV NEXT_TELEMETRY_DISABLED=1
 ENV PORT=3000
 ENV HOSTNAME=0.0.0.0
 
-# Copy build artifacts
 COPY --from=builder /app/.next/standalone ./
 COPY --from=builder /app/.next/static ./.next/static
 COPY --from=builder /app/public ./public
 
-# Copy the Blender compression script
 COPY --from=builder /app/scripts ./scripts
 
-# Ensure tmp dir for uploads exists
 RUN mkdir -p /tmp/assets
 
-# Copy entrypoint
 COPY docker-entrypoint.sh /docker-entrypoint.sh
 RUN chmod +x /docker-entrypoint.sh