refactor Dockerfile: consolidate package installation and remove packages.txt

Dockerfile

@@ -7,8 +7,7 @@ WORKDIR /app
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
-        git curl \
-        build-essential \
+        git curl build-essential \
     && rm -rf /var/lib/apt/lists/*
 
 COPY . /app/env
@@ -18,23 +17,9 @@ RUN curl -LsSf https://astral.sh/uv/install.sh | sh && \
     mv /root/.local/bin/uv /usr/local/bin/uv && \
     mv /root/.local/bin/uvx /usr/local/bin/uvx
 
-RUN --mount=type=cache,target=/root/.cache/uv \
-    if [ -f uv.lock ]; then \
-        uv sync --frozen --no-install-project --no-editable; \
-    else \
-        uv sync --no-install-project --no-editable; \
-    fi
-
-RUN --mount=type=cache,target=/root/.cache/uv \
-    if [ -f uv.lock ]; then \
-        uv sync --frozen --no-editable; \
-    else \
-        uv sync --no-editable; \
-    fi
-
-RUN /app/env/.venv/bin/python -m nltk.downloader \
-        wordnet omw-1.4 stopwords punkt \
-        averaged_perceptron_tagger_eng punkt_tab
+# Install into a fixed target directory (no venv, no symlinks)
+RUN --mount=type=cache,target=/root/.cache/pip \
+    pip install --target /app/packages -r requirements.txt
 
 
 # -------- RUNTIME STAGE --------
@@ -42,16 +27,21 @@ FROM ${BASE_IMAGE}
 
 WORKDIR /app
 
-COPY --from=builder /app/env/.venv /app/env/.venv
+# Copy source code and pre-installed packages
 COPY --from=builder /app/env /app/env
-COPY --from=builder /root/nltk_data /root/nltk_data
+COPY --from=builder /app/packages /app/packages
+
+# Download NLTK data using the packages we just copied
+RUN PYTHONPATH=/app/packages python -m nltk.downloader \
+        wordnet omw-1.4 stopwords punkt \
+        averaged_perceptron_tagger_eng punkt_tab
 
-ENV PATH="/app/env/.venv/bin:$PATH"
-ENV PYTHONPATH="/app/env:$PYTHONPATH"
+# packages dir prepended so it shadows anything in the base image
+ENV PYTHONPATH="/app/packages:/app/env:$PYTHONPATH"
 
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
     CMD curl -f http://localhost:7860/health || exit 1
 
 ENTRYPOINT []
-CMD ["/app/env/.venv/bin/uvicorn", "server.app:app", \
+CMD ["python", "-m", "uvicorn", "server.app:app", \
      "--host", "0.0.0.0", "--port", "7860", "--app-dir", "/app/env"]

packages.txt

@@ -1,3 +0,0 @@
-# packages.txt
-build-essential
-python3-dev