[kylemclaren]

Changes

Astro detection

• Detect astro in devDependencies too. Before, an app with astro only in devDependencies was a generic Node.js app, and the container ran node index.js.
• Detect @astrojs/node in devDependencies too. Before, such an app was a static site, and nginx showed its default page.
• When astro or @astrojs/node is in devDependencies of an SSR app, do not prune development dependencies. The server imports the adapter and its dependencies (for example server-destroy) at runtime.
• With the node adapter in middleware mode, the build output is a handler for a custom server, not a server. The app is now not treated as SSR, so the container runs the start script. Before, the container ran node ./dist/server/entry.mjs, which exited at once.
• Read outDir from astro.config.*. Before, a custom outDir caused the image build to fail, because /app/dist did not exist.
• Read base from astro.config.* for static sites. The files are copied below the base path, so /docs/ serves the site. Before, all pages returned 404.

Static Astro sites with nginx

• Add an nginx config with absolute_redirect off. Before, /about redirected to http://<host>/about/, which drops HTTPS and the port.
• Add error_page 404 /404.html, so the site's own 404 page is served (for example Starlight's). Before, nginx showed its default 404 page.
• Do not prune development dependencies in the build stage. The final image contains only the built files.

--caddy option

• New --caddy option: serve static Vite and Astro sites with caddy:2-alpine instead of nginx. nginx stays the default.
• For Astro, the Caddyfile also serves the site's 404 page. Caddy redirects are relative by default.
• The image is approximately 93 MB, against approximately 240 MB for nginx.
• --nginx-root does not change.

Tests

• New unit tests: detection from devDependencies, middleware mode, outDir and base, and --caddy.
• New fixtures: astro-config (outDir, base, astro in devDependencies), astro-middleware, astro-caddy and vite-caddy.
• astro-static fixture updated for the nginx config.

These apps from create-astro build and start in Docker, and their pages, redirects and 404 pages give the expected responses:

• minimal, basics, blog and starlight templates, with npm. minimal also with pnpm.
• Static site with a custom 404 page, with nginx and with --caddy.
• Static site with outDir, with base (nginx and --caddy), and with astro in devDependencies.
• Node adapter with output: 'server', with the default output and an on-demand page, with @astrojs/node in devDependencies, and in middleware mode with a custom server.