Fix Dockerfile

Author: JayDoubleu

Dockerfile

@@ -19,6 +19,14 @@ 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.
@@ -28,19 +36,28 @@ COPY --from=frontend-builder /app/frontend/dist /deps/frontend/dist
 # -- Adding local package . --
 ADD backend/ /deps/backend
 # -- End of local package . --
-    
-# -- Installing all local dependencies --
-RUN PYTHONDONTWRITEBYTECODE=1 pip install --no-cache-dir -c /api/constraints.txt -e /deps/backend
+
+# -- 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
-RUN mkdir -p /api/langgraph_api /api/langgraph_runtime /api/langgraph_license &&     touch /api/langgraph_api/__init__.py /api/langgraph_runtime/__init__.py /api/langgraph_license/__init__.py
+# 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 ~<:===~~~ --
-RUN pip uninstall -y 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
+# -- 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
+WORKDIR /deps/backend