non-root user aftr installing system dependencies

Dockerfile

@@ -1,5 +1,10 @@
 FROM python:3.12-slim
 
+# Install system dependencies as root
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
 # Create a non-root user
 RUN useradd -m -u 1000 user
 USER user
@@ -7,11 +12,6 @@ ENV PATH="/home/user/.local/bin:$PATH"
 
 WORKDIR /app
 
-# Install system dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential \
-    && rm -rf /var/lib/apt/lists/*
-
 # Copy source code and dependency files FIRST (needed by flit)
 COPY --chown=user pyproject.toml ./
 COPY --chown=user nygaardcodecommentclassification ./nygaardcodecommentclassification