Docker for NodeJS

Dockerfile

FROM node:10.11-alpine

# Create app dir
RUN mkdir -p /usr/app
WORKDIR /usr/app

# Install npm packages (production only)
COPY package.json package-lock.json /usr/app/
RUN npm install --production > /dev/null 2>&1

# Copy all files
COPY . /usr/app/

# Expose port
EXPOSE 3000

# Env vars
ENV NODE_ENV production
ENV PORT 3000

# Define run command
CMD [ "node", "src/index.js" ]

# Run as non-root user
USER node