Update Dockerfile

Dockerfile

@@ -2,22 +2,31 @@
 
 FROM python:3.10-slim
 
-# install tini for proper signal forwarding
-RUN apt-get update && apt-get install -y --no-install-recommends tini \
+# install tini and system deps
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    tini build-essential \
+    && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
+# set workdir
 WORKDIR /app
+
+# install python deps first (layer caching)
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
 
+# copy app code
 COPY . .
 
+# expose port
 EXPOSE 7860
 
-# use tini as PID 1 so SIGTERM/SIGINT get forwarded
+# use tini to forward signals correctly (prevents zombie processes)
 ENTRYPOINT ["/usr/bin/tini", "--"]
 
-# default is SIGTERM, but you can override:
+# optional: default stop signal
 STOPSIGNAL SIGTERM
 
+# start the app
 CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]