Visually test Gatsby production build, instead of development server

* Copy npm scripts from newer upstream Gatsby starter

.github/workflows/vrt.yml

@@ -21,7 +21,7 @@ jobs:
         run: npm run build
 
       - name: Start server (in background)
-        run: npm run start &
+        run: npm run serve &
 
       - name: Lost Pixel
         uses: lost-pixel/lost-pixel@v3.16.0

lostpixel.config.ts

@@ -3,7 +3,7 @@ import { CustomProjectConfig } from 'lost-pixel'
 export const config: CustomProjectConfig = {
   pageShots: {
     pages: [{ path: '/', name: 'landing' }],
-    baseUrl: 'http://172.17.0.1:8000'
+    baseUrl: 'http://172.17.0.1:9000'
   },
   lostPixelProjectId: 'clud602ae10romo0e861bvpv2',
   apiKey: process.env.LOST_PIXEL_API_KEY

package.json

@@ -4,7 +4,9 @@
   "description": "Source for https://johnkurkowski.com.",
   "scripts": {
     "build": "gatsby build",
+    "clean": "gatsby clean",
     "prepare": "husky",
+    "serve": "gatsby serve",
     "start": "gatsby develop --host 0.0.0.0",
     "test": "eslint . && prettier-standard --check $(git ls-files '*.css' '*.js' '*.jsx' '*.mjs' '*.ts' '*.tsx') && npm run type-check",
     "type-check": "tsc --pretty"