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46 lines
2.2 KiB
Markdown
46 lines
2.2 KiB
Markdown
# Awesome GitHub Copilot website
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Astro + Starlight site published to <https://awesome-copilot.github.com/>.
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## Local development
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Run these from the **repository root** (they generate the data the site needs first):
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```bash
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npm run website:data # generate public/data/*.json from repo content
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npm run website:dev # generate data + start the dev server
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npm run website:build # full production build
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```
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## Social preview cards (LinkedIn, etc.)
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Shared links render as large preview cards driven by Open Graph / Twitter meta tags.
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LinkedIn (and most platforms) read **Open Graph** — primarily `og:image` — while Twitter/X
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also uses `twitter:card=summary_large_image`. Most tags are produced automatically:
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- **Starlight defaults** emit `og:title`, `og:description`, `og:url`, `og:type`,
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`og:site_name`, and `twitter:card=summary_large_image`.
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- **`astro.config.mjs`** (global `head`) emits the shared image tags: `og:image`,
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`og:image:width`, `og:image:height`, `og:image:alt`, and `twitter:image`.
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- **`src/components/Head.astro`** adds `twitter:title`/`description`, `og:image:secure_url`,
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`og:image:type`, and `twitter:image:alt`.
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Each page's `title` and `description` (StarlightPage frontmatter) flow into the card text,
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so keep them clear and benefit-focused.
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### The image-dimension invariant
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`og:image:width` / `og:image:height` in `astro.config.mjs` describe `public/images/social-image.png`
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(currently **2400×1260**, ~1.91:1). Crawlers use these dimensions to understand the image and
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may use them when selecting/rendering the preview. If you swap the image or add a per-page image
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override, update the **full** image set so every tag stays consistent: `og:image`,
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`og:image:width`, `og:image:height`, `og:image:alt`, and `twitter:image` (the last one matters
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because `Head.astro` derives `og:image:secure_url` from `twitter:image` first).
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### After deploying
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LinkedIn caches scrapes aggressively. To force a refresh and confirm the card renders, run the
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changed URL through the [LinkedIn Post Inspector](https://www.linkedin.com/post-inspector/).
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HTML output alone doesn't prove the live card — verify the deployed image returns HTTP 200 over
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HTTPS with `Content-Type: image/png` and no auth.
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