chore: hands-off ✋🏻

[moreal]

I have a plan to hand off from this 9c-rudolf project. So I opened this pull request to clean up repository and write more documents for next contributors.

Changes

Minimize Docker image

Previously, it required 1.4GB disk space to pull 9c-rudolf Docker image and it was too heavy. So this pull request reduces the size by using base Docker image with -slim suffix and installing only dependencies not devDependencies

$ docker images
REPOSITORY      TAG               IMAGE ID       CREATED         SIZE
<none>          <none>            ec3ec973e3e3   4 minutes ago   424MB  # After
<none>          <none>            ffbc5352c779   4 hours ago     1.49GB # Before

Updates some dependencies

• eslint → removed
• prettier → removed
• @biomejs/biome → introduced
• yarn → 4.5.3
• Prisma → 5.4.2
• Node.js → 22.12

More documents

It writes more documents in Korean.

[CLAassistant]

All committers have signed the CLA.