diff --git a/nexus-mcp/Dockerfile b/nexus-mcp/Dockerfile
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+FROM python:3.11-slim
+
+# 1. Install System Deps & PowerShell
+RUN apt-get update && apt-get install -y \
+    curl gnupg apt-transport-https \
+    && curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add - \
+    && curl https://packages.microsoft.com/config/debian/11/prod.list > /etc/apt/sources.list.d/microsoft.list \
+    && apt-get update && apt-get install -y powershell \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+RUN ln -s /usr/bin/pwsh /usr/bin/powershell
+
+WORKDIR /app
+
+# 2. Use pyproject.toml to install dependencies
+# We copy the pyproject.toml first to cache the 'pip install' layer
+COPY pyproject.toml .
+# Create a dummy src dir so pip doesn't complain during the install
+RUN mkdir src && pip install . 
+
+# 3. Copy the actual source code
+COPY src/ ./src/
+COPY lib/ ./lib/
+
+# 4. Runtime Config
+ENV PYTHONPATH="/app/src:/app"
+# This matches the [project.scripts] entry in your toml
+CMD ["python", "src/main.py"]
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