Create a deterministic canvas

1import { mkdir, writeFile } from 'node:fs/promises';2import { join } from 'node:path';3import { ApexPainter } from 'apexify.js';4 5const outputDir = process.env.APEXIFY_EXAMPLE_OUTPUT_DIR;6if (!outputDir) throw new Error('APEXIFY_EXAMPLE_OUTPUT_DIR is required.');7 8const painter = new ApexPainter({ type: 'buffer' });9const canvas = await painter.createCanvas({ width: 320, height: 180, colorBg: '#0f172a' });10if (!Buffer.isBuffer(canvas.buffer)) throw new Error('Expected createCanvas() to expose a PNG Buffer.');11 12await mkdir(outputDir, { recursive: true });13await writeFile(join(outputDir, 'canvas-basic.png'), canvas.buffer);14console.log(JSON.stringify({ example: 'node.canvas.basic', format: 'png', width: 320, height: 180, bytes: canvas.buffer.length }));