Dockerfile

# syntax = docker/dockerfile:1

# Adjust NODE_VERSION as desired
ARG NODE_VERSION=14
FROM node:${NODE_VERSION}-slim as base

LABEL fly_launch_runtime="NodeJS"

# NodeJS app lives here
WORKDIR /app

# Set production environment
ENV NODE_ENV=production
ARG YARN_VERSION=1.22.19
RUN npm install -g yarn@$YARN_VERSION --force


# Throw-away build stage to reduce size of final image
FROM base as build

# Install packages needed to build node modules
RUN apt-get update -qq && \
    apt-get install -y pkg-config build-essential python3 && \
    ln -s /usr/bin/python3 /usr/bin/python

# Install node modules
COPY --link package.json yarn.lock ./
RUN yarn install --production=false

# Copy application code
COPY --link . .

# Build application
RUN yarn run build

# Remove development dependencies
RUN yarn install --production=true


# Final stage for app image
FROM base

# Copy built application
COPY --from=build /app /app

# Start the server by default, this can be overwritten at runtime
CMD [ "yarn", "run", "start" ]