dockerfile

# ==============================
# STEP 1: Base image
# ==============================
FROM python:3.12-slim

# Install system dependencies
RUN apt-get update && apt-get install -y curl build-essential libpq-dev && rm -rf /var/lib/apt/lists/*

# ==============================
# STEP 2: Install uv
# ==============================
RUN curl -LsSf https://astral.sh/uv/install.sh | sh

# Add uv to PATH
ENV PATH="/root/.local/bin:$PATH"

# ==============================
# STEP 3: Set workdir
# ==============================
WORKDIR /app

# Copy dependency files first (for caching)
COPY pyproject.toml uv.lock ./

# Install project dependencies
RUN uv sync --frozen

# ==============================
# STEP 4: Copy project code
# ==============================
COPY . .

# ==============================
# STEP 5: Expose Dagit port
# ==============================
EXPOSE 3000

# ==============================
# STEP 6: Default command
# ==============================
# You can switch between dagit UI or daemon-only
CMD ["uv", "run", "dagster", "dev", "-h", "0.0.0.0", "-p", "3000"]