Dockerfile

# Use Node.js 14 image.
# can't find one for 16
# https://hub.docker.com/_/node

FROM node:18

# Create and change to the app directory.
WORKDIR /usr/src/app

# Copy application dependency manifests to the container image.
# A wildcard is used to ensure copying both package.json AND package-lock.json (when available).
# Copying this first prevents re-running npm install on every code change.
COPY package*.json ./

# Installing production dependencies only breaks the app
# Install production dependencies.
# If you add a package-lock.json, speed your build by switching to 'npm ci'.
# RUN npm install --only=production
# RUN npm ci --only=production
RUN npm install

# Copy local code to the container image.
COPY . ./

# Run build step
RUN npm run build

# Run the web service on container startup.
CMD [ "node", "./dist/index.js" ]