# Stage 1: Build React Frontend FROM node:20-alpine AS frontend-builder # Set working directory for frontend WORKDIR /app/frontend # Copy frontend package files and install dependencies COPY frontend/package.json ./ COPY frontend/package-lock.json ./ # If you use yarn or pnpm, adjust accordingly (e.g., copy yarn.lock or pnpm-lock.yaml and use yarn install or pnpm install) RUN npm install # Copy the rest of the frontend source code COPY frontend/ ./ # Build the frontend RUN npm run build # Stage 2: Python Backend FROM docker.io/langchain/langgraph-api:3.11 # -- Install UV -- # First install curl, then install UV using the standalone installer RUN apt-get update && apt-get install -y curl && \ curl -LsSf https://astral.sh/uv/install.sh | sh && \ apt-get clean && rm -rf /var/lib/apt/lists/* ENV PATH="/root/.local/bin:$PATH" # -- End of UV installation -- # -- Copy built frontend from builder stage -- # The app.py expects the frontend build to be at ../frontend/dist relative to its own location. # If app.py is at /deps/backend/src/agent/app.py, then ../frontend/dist resolves to /deps/frontend/dist. COPY --from=frontend-builder /app/frontend/dist /deps/frontend/dist # -- End of copying built frontend -- # -- Adding local package . -- ADD backend/ /deps/backend # -- End of local package . -- # -- Installing all local dependencies using UV -- # First, we need to ensure pip is available for UV to use RUN uv pip install --system pip setuptools wheel # Install dependencies with UV, respecting constraints RUN cd /deps/backend && \ PYTHONDONTWRITEBYTECODE=1 UV_SYSTEM_PYTHON=1 uv pip install --system -c /api/constraints.txt -e . # -- End of local dependencies install -- ENV LANGGRAPH_HTTP='{"app": "/deps/backend/src/agent/app.py:app"}' ENV LANGSERVE_GRAPHS='{"agent": "/deps/backend/src/agent/graph.py:graph"}' # -- Ensure user deps didn't inadvertently overwrite langgraph-api # Create all required directories that the langgraph-api package expects RUN mkdir -p /api/langgraph_api /api/langgraph_runtime /api/langgraph_license /api/langgraph_storage && \ touch /api/langgraph_api/__init__.py /api/langgraph_runtime/__init__.py /api/langgraph_license/__init__.py /api/langgraph_storage/__init__.py # Use pip for this specific package as it has poetry-based build requirements RUN PYTHONDONTWRITEBYTECODE=1 pip install --no-cache-dir --no-deps -e /api # -- End of ensuring user deps didn't inadvertently overwrite langgraph-api -- # -- Removing pip from the final image (but keeping UV) -- RUN uv pip uninstall --system pip setuptools wheel && \ rm -rf /usr/local/lib/python*/site-packages/pip* /usr/local/lib/python*/site-packages/setuptools* /usr/local/lib/python*/site-packages/wheel* && \ find /usr/local/bin -name "pip*" -delete # -- End of pip removal -- WORKDIR /deps/backend