Fix Dockerfile: run apt-get as root and install uv as user

Dockerfile

@@ -5,23 +5,28 @@ ENV PYTHONDONTWRITEBYTECODE=1
 ENV PIP_NO_CACHE_DIR=1
 ENV PIP_DISABLE_PIP_VERSION_CHECK=1
 
+# 1) Installo pacchetti di sistema COME ROOT
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+# 2) Creo l'utente non-root
 RUN useradd -m -u 1000 user
+
+# 3) Passo all'utente non-root
 USER user
 ENV PATH="/home/user/.local/bin:$PATH"
 
 WORKDIR /cardioTrack
 
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    curl ca-certificates \
-    && rm -rf /var/lib/apt/lists/*
-
+# 4) Installo uv come user (finisce in /home/user/.local/bin)
 RUN curl -LsSf https://astral.sh/uv/install.sh | sh
-#ENV PATH="/root/.local/bin:$PATH"
-
-COPY --chown=user pyproject.toml uv.lock ./ 
 
+# 5) Copio i file di progetto e faccio uv sync
+COPY --chown=user pyproject.toml uv.lock ./
 RUN uv sync --locked --no-install-project
 
+# 6) Copio il resto dei file necessari all'inferenza
 COPY --chown=user predicting_outcomes_in_heart_failure ./predicting_outcomes_in_heart_failure
 COPY --chown=user models/nosex/random_forest.joblib ./models/nosex/random_forest.joblib
 COPY --chown=user reports/nosex/random_forest/cv_parameters.json ./reports/nosex/random_forest/cv_parameters.json
@@ -29,6 +34,7 @@ COPY --chown=user data/interim/preprocess_artifacts/scaler.joblib ./data/interim
 COPY --chown=user metrics/test/nosex/random_forest.json ./metrics/test/nosex/random_forest.json
 COPY --chown=user README.md ./README.md
 
+# EXPOSE non è necessario per HF, ma non dà fastidio
 EXPOSE 7860
 
 CMD ["uv", "run", "uvicorn", "predicting_outcomes_in_heart_failure.app.main:app", "--host", "0.0.0.0", "--port", "7860"]