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# Multi-stage Dockerfile for LeRobot Arena Transport Server
# Stage 1: Build frontend with Bun (client library + demo)
FROM oven/bun:1-alpine AS frontend-builder
WORKDIR /app
# Install git for dependencies that might need it
RUN apk add --no-cache git
# Copy all JavaScript/TypeScript files
COPY client/js/ ./client/js/
COPY demo/ ./demo/
# Build and link client library
WORKDIR /app/client/js
RUN bun install
RUN bun run build
RUN bun link
# Build demo with linked client library
WORKDIR /app/demo
RUN bun link lerobot-arena-client
RUN bun install
RUN bun run build
# Stage 2: Python backend with uv
FROM ghcr.io/astral-sh/uv:python3.12-bookworm-slim
# Install system dependencies needed for video processing
RUN apt-get update && apt-get install -y \
libavformat-dev \
libavcodec-dev \
libavdevice-dev \
libavutil-dev \
libswscale-dev \
libswresample-dev \
pkg-config \
&& rm -rf /var/lib/apt/lists/*
# Set up a new user named "user" with user ID 1000 (required for HF Spaces)
RUN useradd -m -u 1000 user
# Switch to the "user" user
USER user
# Set home to the user's home directory
ENV HOME=/home/user \
PATH=/home/user/.local/bin:$PATH
# Set the working directory to the user's home directory
WORKDIR $HOME/app
# Copy Python project files for dependency resolution
COPY --chown=user server/pyproject.toml server/uv.lock* ./server/
# Install dependencies first (better caching)
WORKDIR $HOME/app/server
RUN uv sync --no-install-project
# Copy the rest of the Python backend
COPY --chown=user server/ ./
# Install the project itself
RUN uv sync
# Copy built frontend from previous stage with proper ownership
COPY --chown=user --from=frontend-builder /app/demo/build $HOME/app/static-frontend
# Set working directory back to app root
WORKDIR $HOME/app
# Expose port 7860 (HF Spaces default)
EXPOSE 7860
# Start the FastAPI server (serves both frontend and backend)
CMD ["sh", "-c", "cd server && SERVE_FRONTEND=true uv run python launch_with_ui.py"] |