A better Dockerfile

good.Dockerfile

# pull official base image
FROM node:13.12.0-alpine

# set working directory to /app
WORKDIR /app

# add `/app/node_modules/.bin` to $PATH
ENV PATH /app/node_modules/.bin:$PATH

# copy package files to /app and install
COPY package.json ./
COPY package-lock.json ./
RUN npm install --silent

# copy rest of project to /app
COPY project/ ./