Dockerfile

# Build target base #
#####################
FROM node:14-alpine AS base
WORKDIR /app
ARG NODE_ENV=production
ENV PATH=/app/node_modules/.bin:$PATH \
    NODE_ENV="$NODE_ENV"
RUN apk --no-cache add curl
COPY package.json yarn.lock /app/
EXPOSE 3000

# Build target dependencies #
#############################
FROM base AS dependencies
# Install prod dependencies
RUN yarn install --production && \
    # Cache prod dependencies
    cp -R node_modules /prod_node_modules && \
    # Install dev dependencies
    yarn install --production=false

# Build target development #
############################
FROM dependencies AS development
COPY . /app
CMD [ "yarn", "dev" ]

# Build target builder #
########################
FROM base AS builder
COPY --from=dependencies /app/node_modules /app/node_modules
COPY . /app
RUN yarn build && \
    rm -rf node_modules

# Build target production #
###########################
FROM base AS production
COPY --from=builder /app/public /app/public
COPY --from=builder /app/.next /app/.next
COPY --from=dependencies /prod_node_modules /app/node_modules
CMD [ "yarn", "start" ]

HEALTHCHECK --interval=5s --timeout=5s --retries=3 \
    CMD curl --fail http://localhost:3000 || exit 1