Update Dockerfile

Dockerfile

@@ -1,61 +1,56 @@
 #########################
 #        BASE IMAGE     #
 #########################
-FROM python:3.10-slim
+FROM python:3.10-slim as builder
 
 #########################
-#  OS‑LEVEL DEPENDENCIES #
+#  OS-LEVEL DEPENDENCIES #
 #########################
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends build-essential curl && \
-    rm -rf /var/lib/apt/lists/*
-
-#########################
-#      PYTHON LAYER      #
-#########################
-#  ▸ pin NumPy before spaCy to avoid the “dtype size changed” ABI error
-#    (spaCy 3.5.* was compiled against NumPy 1.23)                     ──■
-RUN pip install --no-cache-dir numpy==1.23.5
-
-# core scientific + web stack
-RUN pip install --no-cache-dir \
-      spacy==3.5.2 \
-      transformers==4.53.0 \
-      huggingface-hub==0.33.1 \
-      scikit-learn==1.7.0 \
-      httpx==0.28.1 \
-      pandas==2.3.0 \
-      plotly==6.2.0 \
-      fpdf==1.7.2 \
-      streamlit==1.33.0 \
-      streamlit-agraph==0.0.45 \
-      networkx==3.4.2 \
-      xmltodict==0.14.2 \
-      feedparser==6.0.11 \
-      pydantic==2.11.7 \
-      openai==1.25.0 \
-      google-generativeai==0.5.4
-
-#########################
-#         CODE           #
-#########################
-WORKDIR /app
-COPY . /app
+    apt-get install -y --no-install-recommends \
+    build-essential \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
 
 #########################
-#     SPA‑C MODEL        #
+#  PYTHON DEPENDENCIES  #
 #########################
+# Create requirements layer first for better caching
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Install spaCy model
 RUN python -m spacy download en_core_web_sm
 
 #########################
-#   EXPOSE & START       #
+#  APPLICATION SETUP    #
+#########################
+WORKDIR /app
+COPY . .
+
+#########################
+#  RUNTIME CONFIG       #
 #########################
-# Hugging Face forwards $PORT → 7860 by default. Honour that env‑var.
-ENV PORT 7860
-EXPOSE 7860
+# Use multi-stage build for production
+FROM python:3.10-slim as runtime
+
+# Copy installed dependencies
+COPY --from=builder /usr/local/lib/python3.10/site-packages /usr/local/lib/python3.10/site-packages
+COPY --from=builder /usr/local/bin /usr/local/bin
+COPY --from=builder /app /app
+
+WORKDIR /app
+
+# Environment configuration
+ENV PORT=7860 \
+    PYTHONUNBUFFERED=1 \
+    PYTHONPATH=/app
+
+EXPOSE $PORT
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:$PORT/health || exit 1
 
-# Headless mode is mandatory inside a container.
-CMD streamlit run app.py \
-    --server.headless=true \
-    --server.address=0.0.0.0 \
-    --server.port=$PORT
+# Run with gunicorn for production
+CMD ["gunicorn", "--bind", "0.0.0.0:$PORT", "--workers", "4", "--threads", "2", "app:server"]