Development Dockerfile and compose file for bun w/ SvelteKit

compose.develop.yaml

services:
    frontend:
    image: <Your image name>
    build:
      context: frontend
      dockerfile: development.Dockerfile
    develop:
        watch:
        - action: sync
          path: ./frontend
          target: /usr/src/app
          initial_sync: true
          ignore:
              - node_modules/
              - .svelte-kit/
        - action: rebuild
          path: ./frontend/package.json
    env_file:
      - path: ./frontend/.env.development
        required: false
    restart: always
    command: "bun dev"

development.Dockerfile

# From the official bun Dockerfile tutorial
FROM oven/bun:1 AS base
WORKDIR /usr/src/app

FROM base AS install
RUN mkdir -p /temp/dev
COPY package.json bun.lock /temp/dev/
RUN cd /temp/dev && bun install --frozen-lockfile
RUN cd /temp/dev && bun add -D @rollup/rollup-linux-arm64-gnu

FROM base AS development

ENV NODE_ENV=development

COPY --chown=bun:bun --from=install /temp/dev/node_modules node_modules
COPY --chown=bun:bun . .
# For SvelteKit
RUN mkdir .svelte-kit/ && chown bun:bun .svelte-kit
# If you have permissions issues, run as root (delete line below)
USER bun
EXPOSE 5173/tcp
# Vite hot-reload port
EXPOSE 24678/tcp
CMD ["bun", "dev"]