Dockerfile for production deployment of a turborepo based svelte app (works on dokploy)

Dockerfile

FROM oven/bun:latest AS base
WORKDIR /app

# Turbo prune stage for isolated deployment
FROM base AS prepare
RUN bun install -g turbo
COPY . .
ARG APP_NAME
RUN turbo prune $APP_NAME --docker

# Build
FROM base AS builder
ARG APP_NAME

# Copy and install package.json
# for using caching as deps don't change frequently
COPY --from=prepare /app/out/json/ .
RUN bun install --frozen-lockfile

# Copy full for building
COPY --from=prepare /app/out/full/ .

# having following in turbo.json at monorepo level
# ```json
# "futureFlags": {
#   "pruneIncludesGlobalFiles": true
# },
# ```
# is important for turbo to keep the .env file present at app level
# Copy env as should be lost between stages
COPY --from=prepare /app/apps/$APP_NAME/.env ./apps/$APP_NAME/.env
# build
RUN bun run build

# Production deps installation
FROM base AS production-deps
ARG APP_NAME

# again for caching copy from json
COPY --from=prepare /app/out/json/ .
RUN bun install --production --frozen-lockfile

# ---
FROM oven/bun:slim AS runner
WORKDIR /app
ARG APP_NAME

# copy the installed production deps
COPY --from=production-deps /app/apps/$APP_NAME/node_modules .

# copy the build files
COPY --from=builder /app/apps/$APP_NAME/build ./build
COPY --from=builder /app/apps/$APP_NAME/svelte.config.js ./svelte.config.js

EXPOSE 3000
CMD ["bun", "./build/index.js"]

turbo.json

{
  "$schema": "https://turborepo.dev/schema.json",
  "ui": "tui",
  "futureFlags": {
    "pruneIncludesGlobalFiles": true
  },
  "tasks": {
    "build": {
      "dependsOn": ["^build"],
      "inputs": ["$TURBO_DEFAULT$", ".env*"],
      "outputs": [".svelte-kit/**", ".vercel/**", "dist/**"]
    },
    "lint": {
      "dependsOn": ["^lint"]
    },
    "check-types": {
      "dependsOn": ["^check-types"]
    },
    "dev": {
      "cache": false,
      "persistent": true
    }
  }
}