# Dockerfile.multi-stage

# Stage 1: Build
FROM python:3.9-alpine AS builder

# Install necessary build dependencies
RUN apk add --no-cache build-base \
    && apk add --no-cache gfortran musl-dev lapack-dev

# Set the working directory
WORKDIR /app

# Copy the requirements file and install dependencies
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code to the working directory
COPY . .

# Uninstall unnecessary dependencies
RUN pip uninstall -y pandas && apk del build-base gfortran musl-dev lapack-dev

# Stage 2: Production
FROM python:3.9-alpine

# Set the working directory
WORKDIR /app

# Copy only the necessary files from the build stage
COPY --from=builder /app /app

# Expose the port the app will run on
EXPOSE 5000

# Run the Flask app
CMD ["python", "app.py"]

# Dockerfile.multi-stage

# Stage 1: Build
FROM python:3.9-alpine AS builder

# Install necessary build dependencies
RUN apk add --no-cache build-base \
    && apk add --no-cache gfortran musl-dev lapack-dev

# Set the working directory
WORKDIR /app

# Copy the requirements file and install dependencies
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code to the working directory
COPY . .

# Uninstall unnecessary dependencies
RUN pip uninstall -y pandas && apk del build-base gfortran musl-dev lapack-dev

# Stage 2: Production
FROM python:3.9-alpine

# Set the working directory
WORKDIR /app

# Copy only the necessary files from the build stage
COPY --from=builder /app /app

# Expose the port the app will run on
EXPOSE 5000

# Run the Flask app
CMD ["python", "app.py"]

• 编译

docker build -f Dockerfile.multi-stage -t flask-app:multi-stage .

docker build -f Dockerfile.multi-stage -t flask-app:multi-stage .