Add ComfyUIMini mobile-friendly UI integration

New features:
- ComfyUIMini container (Node.js Alpine, ~150MB) for mobile/tablet access
- Separate container architecture with shared Docker network
- Health checks on both services with proper dependency ordering
- Shared output volume for image gallery feature

Files added:
- comfyuimini/Dockerfile - Node.js 20 Alpine with tsx runtime
- comfyuimini/.dockerignore - Build context filtering

Files updated:
- docker-compose.yml - Added comfyuimini service, network, health checks
- .env.example - Added COMFYUIMINI_PORT and COMFYUIMINI_REF
- README.md - Architecture diagram, ComfyUIMini docs, updated credits

Access points:
- ComfyUI (Desktop): http://<host>:8188
- ComfyUIMini (Mobile): http://<host>:3000

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

comfyuimini/.dockerignore

@@ -0,0 +1,21 @@
+# Node.js
+node_modules/
+npm-debug.log*
+
+# Git
+.git/
+.gitignore
+
+# Documentation
+*.md
+LICENSE
+
+# Environment
+.env*
+
+# IDE
+.vscode/
+.idea/
+
+# Build artifacts (will be generated in container)
+dist/

comfyuimini/Dockerfile

@@ -0,0 +1,42 @@
+# ComfyUIMini - Mobile-friendly UI for ComfyUI
+# Lightweight Node.js container that proxies to ComfyUI
+FROM node:20-alpine
+
+LABEL maintainer="SparkyUI"
+LABEL description="ComfyUIMini mobile UI for ComfyUI on DGX Spark"
+
+WORKDIR /app
+
+# Install git for cloning, then clean up
+RUN apk add --no-cache git
+
+# Clone ComfyUIMini
+ARG COMFYUIMINI_REF=main
+RUN git clone https://github.com/ImDarkTom/ComfyUIMini.git . && \
+    git checkout ${COMFYUIMINI_REF}
+
+# Install all deps, build TypeScript, then prune dev dependencies
+RUN npm ci && \
+    npm run build && \
+    npm prune --omit=dev
+
+# Create config directory and default config
+# Config is overridden at runtime via NODE_CONFIG env var
+RUN mkdir -p config && \
+    cp config/default.example.json config/default.json
+
+# Create directories for workflows and ensure proper permissions
+RUN mkdir -p workflows && \
+    chown -R node:node /app
+
+# Switch to non-root user
+USER node
+
+EXPOSE 3000
+
+# Health check - verify the server responds
+HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
+    CMD wget --no-verbose --tries=1 --spider http://localhost:3000/ || exit 1
+
+# Project uses tsx to run TypeScript directly (not compiled to dist/)
+CMD ["npm", "start"]