Dockerfile

# syntax = docker/dockerfile:1

# Adjust NODE_VERSION as desired
ARG NODE_VERSION=20.11.1
FROM node:${NODE_VERSION}-slim as base

LABEL fly_launch_runtime="Node.js"

# Node.js app lives here
WORKDIR /app

# Set production environment
ENV NODE_ENV=production


# 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 python-is-python3 2to3 pkg-config build-essential curl

# Install lamdera
RUN curl https://static.lamdera.com/bin/lamdera-1.1.0-linux-x86_64 -o /usr/local/bin/lamdera && \
    chmod a+x /usr/local/bin/lamdera

# Install node modules
COPY --link package.json package-lock.json elm-tooling.json ./
RUN npm ci --include=dev

# Copy application code
COPY --link . .

# Build application
RUN npm run build

# TODO: This is removing dependencies needed for koa. Why?
# Remove development dependencies
# RUN npm prune --omit=dev

# 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
EXPOSE 3000
CMD [ "npm", "run", "start" ]