Add Quartz service for serving Obsidian notes at /notes/

Replaces the custom Go/Vue notes system with Quartz v4, a polished
static site generator for Obsidian vaults. Mounts OBSIDIAN_DIR as the
Quartz content directory and serves it at /notes/ with hot-reload via
`npx quartz build --serve`.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

quartz/Dockerfile

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+FROM node:22-slim
+
+RUN apt-get update \
+    && apt-get install --yes git gettext-base \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /quartz
+
+ARG QUARTZ_VERSION=v4.4.0
+RUN git clone --depth 1 --branch ${QUARTZ_VERSION} \
+    https://github.com/jackyzha0/quartz.git . \
+    && npm ci
+
+COPY quartz.config.ts.template /quartz/quartz.config.ts.template
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

quartz/entrypoint.sh

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+#!/bin/sh
+set -e
+
+envsubst '${DOMAIN}' \
+  < /quartz/quartz.config.ts.template \
+  > /quartz/quartz.config.ts
+
+exec npx quartz build --serve --port "${QUARTZ_PORT:-8080}"

quartz/quartz.config.ts.template

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+import { QuartzConfig } from "./quartz/cfg"
+import * as Plugin from "./quartz/plugins"
+
+const config: QuartzConfig = {
+  configuration: {
+    pageTitle: "Notes",
+    pageTitleSuffix: "",
+    enableSPA: true,
+    enablePopovers: true,
+    analytics: null,
+    locale: "en-GB",
+    baseUrl: "www.${DOMAIN}/notes",
+    ignorePatterns: ["private", "templates", ".obsidian"],
+    defaultDateType: "modified",
+    theme: {
+      fontOrigin: "googleFonts",
+      cdnCaching: true,
+      typography: {
+        header: "Schibsted Grotesk",
+        body: "Source Sans Pro",
+        code: "IBM Plex Mono",
+      },
+      colors: {
+        lightMode: {
+          light: "#faf8f8",
+          lightgray: "#e5e5e5",
+          gray: "#b8b8b8",
+          darkgray: "#4e4e4e",
+          dark: "#2b2b2b",
+          secondary: "#284b63",
+          tertiary: "#84a98c",
+          highlight: "rgba(143, 159, 169, 0.15)",
+          textHighlight: "#fff23688",
+        },
+        darkMode: {
+          light: "#161618",
+          lightgray: "#393639",
+          gray: "#646464",
+          darkgray: "#d4d4d4",
+          dark: "#ebebec",
+          secondary: "#7b97aa",
+          tertiary: "#84a98c",
+          highlight: "rgba(143, 159, 169, 0.15)",
+          textHighlight: "#b3aa0288",
+        },
+      },
+    },
+  },
+  plugins: {
+    transformers: [
+      Plugin.FrontMatter(),
+      Plugin.CreatedModifiedDate({ priority: ["frontmatter", "filesystem"] }),
+      Plugin.SyntaxHighlighting(),
+      Plugin.ObsidianFlavoredMarkdown({ enableInHtmlEmbed: false }),
+      Plugin.GitHubFlavoredMarkdown(),
+      Plugin.TableOfContents(),
+      Plugin.CrawlLinks({ markdownLinkResolution: "shortest" }),
+      Plugin.Description(),
+      Plugin.Latex({ renderEngine: "katex" }),
+    ],
+    filters: [Plugin.RemoveDrafts()],
+    emitters: [
+      Plugin.AliasRedirects(),
+      Plugin.ComponentResources(),
+      Plugin.ContentPage(),
+      Plugin.FolderPage(),
+      Plugin.TagPage(),
+      Plugin.ContentIndex({ enableSiteMap: true, enableRSS: true }),
+      Plugin.Assets(),
+      Plugin.Static(),
+      Plugin.NotFoundPage(),
+    ],
+  },
+}
+
+export default config