Dockerfile

# syntax=docker/dockerfile:1

ARG app_dir="/home/node/app"


# * Base Node.js image
FROM node:20-alpine AS base
ARG app_dir
WORKDIR ${app_dir}


# * Installing production dependencies
FROM base AS dependencies

RUN --mount=type=bind,source=package.json,target=package.json \
    --mount=type=bind,source=package-lock.json,target=package-lock.json \
    --mount=type=cache,target=/root/.npm \
    npm ci --omit=dev


# * Installing development dependencies and building the application
FROM base AS build

RUN --mount=type=bind,source=package.json,target=package.json \
    --mount=type=bind,source=package-lock.json,target=package-lock.json \
    --mount=type=cache,target=/root/.npm \
    npm ci

COPY . .
RUN npm run build


# * Running the final application
FROM base AS final
ARG app_dir

USER node

COPY package.json .

COPY --from=dependencies ${app_dir}/node_modules ${app_dir}/node_modules
COPY --from=build ${app_dir}/dist ${app_dir}/dist

CMD ["node", "."]