Dockerfile

# Stage 0, "build-stage", based on Node.js, to build and compile React
FROM node:20.18.0-alpine as build-stage

WORKDIR /app

# copy package.json and package-lock.json into workdir /app
COPY package*.json ./

RUN npm install

# copy all files from workspace into workdir /app
COPY . .

# run the build inside workdir /app with output path /app/build
RUN npm run build

# Stage 2, based on NodeJS, to have only the compiled app, ready for production
FROM node:20.18.0-alpine as serve-stage

WORKDIR /app

# copy dependency definitions
COPY --from=build-stage /app/package.json ./

# copy (build-stage)/app/dist in /app
COPY --from=build-stage /app/dist ./build
COPY --from=build-stage /app/server.js ./build/server.js

RUN npm install express@4.21.1

# Expose the port the app runs in
EXPOSE 5001

# Serve the app
CMD ["node","./build/server.js"]