feat(platform): 开源发布 - 初始化 Open AI Canvas

Dockerfile

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+# syntax=docker/dockerfile:1.7
+
+# 构建 Vite 前端产物。
+FROM oven/bun:1.3.13 AS web-build
+
+WORKDIR /app/web
+COPY web/package.json web/bun.lock ./
+RUN --mount=type=cache,target=/root/.bun/install/cache bun install --cache-dir=/root/.bun/install/cache
+COPY VERSION /app/VERSION
+COPY CHANGELOG.md /app/CHANGELOG.md
+COPY web ./
+RUN bun run build
+
+# 运行镜像：nginx 托管静态前端，并在 Compose 中把 /api 转发到后端服务。
+FROM nginx:1.27-alpine
+
+COPY --from=web-build /app/web/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 3000
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 CMD wget -qO- http://127.0.0.1:3000/ >/dev/null || exit 1