docs: combine landing page and docusaurus together and deploy as one image

website/README.md

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+# Website
+
+## Landing page
+
+Landing page is a single static HTML file located at [`./landing/index.html`](./landing/index.html). It is built
+using [Tailwind CSS](https://tailwindcss.com/).
+
+### Local development
+
+```shell
+cd landing
+open index.html
+# Watch the Tailwind CSS class changes and rebuild style.css
+npm run dev
+```
+
+## Docs and Blog
+
+`/docs` and `/blog` are built using [Docusaurus](https://docusaurus.io/), a modern static website generator.
+
+### Local Development
+
+```
+npm start
+```
+
+This command starts a local development server and opens up a browser window. Most changes are reflected live without
+having to restart the server.
+
+## Deployment
+
+Both the landing page and Docusaurus site are built into a single Docker image that runs Caddy web server to serve the
+static files.
+
+Before building a production image, test the build locally:
+
+```shell
+docker compose -f compose.local.yaml up --build
+```
+
+Verify:
+
+* http://localhost:8000 — should show the landing page
+* http://localhost:3000/docs/ — should show the docs generated by Docusaurus
+* http://localhost:3000/blog/ — should show the blog generated by Docusaurus
+
+### Deploy to production
+
+```shell
+make website-image-push
+uc deploy
+```