Exercise 1: Running the Standalone Server — Possible Solution
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COMMANDS
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npm run build
node ./dist/server/entry.mjs

CONFIRMATION
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The build step produces a real dist/ folder including
dist/server/entry.mjs. Running that file directly with node starts a
standalone HTTP server, printing something like "Server listening on
http://0.0.0.0:4321". Visiting http://localhost:4321 in a browser
serves the real site - the same catch-all routing, database-backed
pages, and admin endpoints from every earlier chapter, now running
from a production build instead of the dev server.

WHY THIS WORKS AS AN ANSWER
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It correctly runs the two required commands in order, and correctly
confirms the resulting standalone server actually serves the site,
not just that the build completed without errors.