Remove CDN from repo

[pan93412]

• refactor: download assets to this repository
• chore: commit assets

[vercel]

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Project	Deployment	Actions	Updated (UTC)
2025	Canceled		May 30, 2026 10:34am

[Copilot]

Pull request overview

This PR removes reliance on an external Google Drive CDN by switching image URLs in loaders to point at locally committed WebP assets, and adds a pre-build script to download/convert those assets from Google Drive.

Changes:

• Added scripts/assets-download.ts to download Google Drive images referenced in Sheets and convert them to WebP for local hosting.
• Updated loaders to return local /assets/drive/{id}.webp paths (prefixed with /${conference.year}) instead of CDN/thumbnail URLs.
• Added sharp dependency and an assets:download script entry.

Reviewed changes

Copilot reviewed 7 out of 122 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
scripts/assets-download.ts	New asset download + WebP conversion pipeline (Google Sheets → Drive → local assets).
loaders/utils.ts	Replaces CDN URL construction with Drive ID extraction + local asset path mapping.
loaders/sponsor.data.ts	Switches sponsor image mapping to local asset paths (no async preload).
loaders/sponsor-news.data.ts	Switches sponsor-news images to local asset paths.
loaders/community.data.ts	Switches community images from Drive thumbnails to local asset paths.
package.json	Adds assets:download script and sharp dependency; bumps Node engine.
pnpm-lock.yaml	Locks sharp and related transitive dependencies.
.env.example	Removes obsolete DRIVE_IMAGE_CDN env var.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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[rileychh]

Google Drive 圖片不需要下載到這吧？目標不是移除 Bunny 而已嗎？

[pan93412]

Google Drive 圖片不需要下載到這吧？目標不是移除 Bunny 而已嗎？

1. Google Drive 不能直連，所以必須下載到 assets 目錄上。VitePress 不能以檔案的形式儲存 assets，若直接全量以 Base64 編碼的形式存在 JS bundle 裡面，則會發生 Optimize session page size and LCP #176 提出的「bundle 過大」的情況。因此，這裡才會採取 2 階段（先下載到 assets，然後 VitePress 再引用）的形式。
2. 這裡的圖片有經過 WebP 壓縮，重複壓縮挺吃 CI 時間（無論是 Quality Checks、Vercel Preview 還是最終的 GitHub Pages 部署）的。這個比較偏向 Git 儲存空間和 CI 時間的 trade-off，考慮到 COSCUP/2025 已經是封存狀態，圖片不會增減，我認為存在 Git Repository 上沒有什麼太大的問題。
3. 另外，有些 Google Drive 圖片的原始連結已經連不上了（比如 ExpressVPN 和 TapPay 的）。下載回來備份確實可以提升編譯的可重現性。

[mirumodapon]

preview 圖片跑不出來誒

[pan93412]

preview 圖片跑不出來誒

看起來是因為 Vercel 沒有 base URL，但 GitHub Pages 和 Local 測試上正常 🤔

我重新用 Dockerfile 寫一個有正確 routing rules 的版本，Vercel 的我沒看太懂怎麼改 🥲

[pan93412]

@mirumodapon 我重新 build 了，可以測試看看～

https://coscup-2025-preview.zeabur.app/2025/sponsor/

Dockerfile:

FROM node:24.6-alpine AS builder

WORKDIR /app

ENV HUSKY=0

RUN corepack enable && corepack prepare pnpm@10.18.0 --activate

RUN --mount=type=cache,target=/root/.local/share/pnpm/store \
    --mount=type=bind,source=package.json,target=package.json \
    --mount=type=bind,source=pnpm-lock.yaml,target=pnpm-lock.yaml \
    pnpm install --frozen-lockfile

COPY . .

RUN pnpm build

FROM zeabur/caddy-static:2.0

COPY --from=builder /app/.vitepress/dist /usr/share/caddy/2025

RUN cat <<'EOF' > /usr/share/caddy/_redirects
/  /2025/  301
EOF

RUN addgroup -S app && adduser -S -G app app \
    && chown -R app:app /usr/share/caddy

USER app

EXPOSE 8080