Dockerfile.backend

# Stage 1: Base
FROM node:22-slim AS base
WORKDIR /usr/src/app

# Install pnpm and curl (for healthcheck)
RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
RUN corepack enable && corepack prepare pnpm@9.0.0 --activate

# Set pnpm global bin directory
ENV PNPM_HOME="/root/.local/share/pnpm"
ENV PATH="${PNPM_HOME}:${PATH}"

# Stage 2: Prune / Extract package.json files
# This stage filters the repo to only the files needed for installation
FROM base AS cleaner
RUN pnpm add -g turbo
COPY . .
# Generate a pruned version of the repo
ARG APP_NAME=long-short-backend
RUN turbo prune ${APP_NAME} --docker

# Stage 3: Install dependencies
FROM base AS installer
# Copy only the lockfile and the pruned package.json files from the cleaner stage
COPY --from=cleaner /usr/src/app/out/json/ .
COPY --from=cleaner /usr/src/app/out/pnpm-lock.yaml ./pnpm-lock.yaml

# Install dependencies (heavily cached)
RUN pnpm install --frozen-lockfile

# Stage 4: Build / Source
FROM base AS builder
COPY --from=installer /usr/src/app ./
# Copy the actual source code (this is what changes often)
COPY --from=cleaner /usr/src/app/out/full/ .
COPY turbo.json turbo.json

# Build the app
ARG APP_NAME=long-short-backend
RUN pnpm turbo build --filter=${APP_NAME}

# Stage 5: Production release
FROM base AS release
COPY --from=builder /usr/src/app ./

# Expose API port
EXPOSE 9999

# Command is set in docker-compose.yml
CMD ["node", "--version"]