optimize Dockerfile: multi-stage build to reduce image size

Author: LazyFP Dev

Dockerfile

@@ -1,17 +1,41 @@
-FROM python:3.11-slim
+FROM python:3.11-slim AS builder
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1
 
-WORKDIR /app
+WORKDIR /build
 
-RUN apt-get update && apt-get install -y --no-install-recommends libmagic1 && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libmagic1 \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+RUN sed -i 's/\\$//; s/--hash=.*$//' requirements.txt && \
+    grep -v '^$\|^#\|via ' requirements.txt > clean-requirements.txt && \
+    pip install --no-cache-dir --prefix=/install -r clean-requirements.txt
 
 COPY . .
-RUN pip install --no-cache-dir .
+RUN pip install --no-cache-dir --prefix=/install .
+
+FROM python:3.11-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PATH="/install/bin:$PATH" \
+    PYTHONPATH="/install/lib/python3.11/site-packages"
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libmagic1 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /install /install
+COPY --from=builder /build/app.py /build/main.py /build/config/ /app/
+COPY --from=builder /build/extractors/ /app/extractors/
+COPY --from=builder /build/core/ /app/core/
+COPY --from=builder /build/static/ /app/static/
 
 RUN mkdir -p fp/dump fp/organized