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unknownbin/Dockerfile

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Docker

# --- Base Stage ---
# Use a lightweight and secure Node.js base image
FROM node:20-alpine AS base
# Set the working directory in the container
WORKDIR /usr/src/app
# Copy package files and install dependencies
# This leverages Docker's layer caching
COPY package*.json ./
RUN npm install --only=production
# --- Build Stage ---
# This stage builds the static assets
FROM base AS build
# Install all dependencies (including devDependencies) to run the build script
COPY package*.json ./
RUN npm install
# Copy the rest of the application source code
COPY . .
# Run the build script to minify CSS and JS
RUN npm run build
# --- Production Stage ---
# This is the final, lean image that will be run
FROM base AS production
# Set a non-root user for security
RUN addgroup -S appgroup && adduser -S appuser -G appgroup
USER appuser
# Copy only the necessary files from the previous stages
COPY --from=build /usr/src/app/node_modules ./node_modules
COPY --from=build /usr/src/app/static ./static
COPY --from=build /usr/src/app/lib ./lib
COPY --from=build /usr/src/app/server.js .
COPY --from=build /usr/src/app/config.json .
# Expose the port the app runs on
EXPOSE 8080
# The command to start the application
CMD [ "node", "server.js" ]