change node version in Dockerfile and package.json

[monsad]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the Node runtime version used in the Docker image and bumps the TypeScript dependency version.

• Bump TypeScript devDependency from ^3.8.3 to ^3.9.10
• Change Docker base image from node:12-alpine to node:20-alpine

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Updated typescript version to ^3.9.10
build/Dockerfile	Switched Docker base image from node:12-alpine to node:20-alpine

Comments suppressed due to low confidence (3)

package.json:11

• The @types/node version is still pinned to Node 13 types; consider updating it to match Node 20 (e.g., ^20.x) so your type definitions align with the new runtime.

    "@types/node": "^13.13.1",

package.json:12

• After bumping the TypeScript version, please update and commit the lockfile (e.g., package-lock.json or yarn.lock) so the dependency tree stays in sync and reproducible.

    "typescript": "^3.9.10"

build/Dockerfile:1

• [nitpick] Consider updating any related project configurations—such as CI workflows, .nvmrc, or the engines field in package.json—to also use Node 20 so all environments remain consistent.

FROM node:20-alpine