Dockerfile

###################
# BUILD FOR LOCAL DEVELOPMENT
###################

FROM node:18-alpine As development

# Create 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 --chown=node:node package*.json ./

# Install app dependencies using the `npm ci` command instead of `npm install`
RUN npm ci

# Bundle app source
COPY --chown=node:node . .

# Use the node user from the image (instead of the root user)
USER node

###################
# BUILD FOR PRODUCTION
###################

FROM node:18-alpine As build

WORKDIR /usr/src/app

COPY --chown=node:node package*.json ./

# In order to run `npm run build` we need access to the Nest CLI which is a dev dependency. In the previous development stage we ran `npm ci` which installed all dependencies, so we can copy over the node_modules directory from the development image
COPY --chown=node:node --from=development /usr/src/app/node_modules ./node_modules

COPY --chown=node:node . .

# Run the build command which creates the production bundle
RUN npm run build

ARG CLIENT_EMAIL
ARG PROJECT_ID
ARG PRIVATE_KEY
ARG DATABASE_URL
ARG API_KEY
ARG AUTH_DOMAIN
ARG STORAGE_BUCKET
ARG APP_ID
ARG MESSAGE_SENDER_ID
ARG PROFILES_BUCKET_NAME
ARG EVENT_QRCODE_BUCKET_NAME
ARG PROFILE_QR_CODE_BUCKET
ARG EVENT_POSTS
ARG NODE_ENV='production'

# Set NODE_ENV environment variable
ENV NODE_ENV=$NODE_ENV
ENV PROJECT_ID=$PROJECT_ID
ENV CLIENT_EMAIL=$CLIENT_EMAIL
ENV PRIVATE_KEY=$PRIVATE_KEY
ENV DATABASE_URL=$DATABASE_URL
ENV API_KEY=$API_KEY
ENV AUTH_DOMAIN=$AUTH_DOMAIN
ENV STORAGE_BUCKET=$STORAGE_BUCKET
ENV APP_ID=$APP_ID
ENV MESSAGE_SENDER_ID=$MESSAGE_SENDER_ID
ENV PROFILES_BUCKET_NAME=$PROFILES_BUCKET_NAME
ENV EVENT_QRCODE_BUCKET_NAME=$EVENT_QRCODE_BUCKET_NAME
ENV PROFILE_QR_CODE_BUCKET=$PROFILE_QR_CODE_BUCKET
ENV EVENT_POSTS=$EVENT_POSTS

# Running `npm ci` removes the existing node_modules directory and passing in --only=production ensures that only the production dependencies are installed. This ensures that the node_modules directory is as optimized as possible
RUN npm ci --only=production && npm cache clean --force

USER node

###################
# PRODUCTION
###################

FROM node:18-alpine As production

# Copy the bundled code from the build stage to the production image
COPY --chown=node:node --from=build /usr/src/app/node_modules ./node_modules
COPY --chown=node:node --from=build /usr/src/app/dist ./dist

# Start the server using the production build
CMD [ "node", "dist/main.js" ]