Add .gitignores

[GregBrimble]

Description

Fixes #787 and WP-2428.

Checklist

• Template Metadata
  • template directory ends with -template
  • "cloudflare" section of package.json is populated
  • template preview image uploaded to Images
  • README is populated and uses <!-- dash-content-start --> and <!-- dash-content-end --> to designate the Dash readme preview
  • package.json contains a deploy command
  • package.json contains private: true and no version field

Example package.json

"private": true,
"cloudflare": {
  "label": "Worker + D1 Database",
  "products": [
    "Workers",
    "D1"
  ],
  "categories": [
    "storage"
  ],
  "docs_url": "https://developers.cloudflare.com/d1/",
  "preview_image_url": "https://imagedelivery.net/wSMYJvS3Xw-n339CbDyDIA/cb7cb0a9-6102-4822-633c-b76b7bb25900/public"
}

[github-actions]

Dashboard preview link