docs(explainer): switch analogy to apartment vs townhome in a gated community

The apartment-vs-townhome framing maps more cleanly onto containers:
- An apartment shares walls, plumbing, air — neighbour noise/smells leak in.
  That's the experience on shared hosting.
- A townhome in a gated community keeps the shared upside (security, gates,
  community centre = the server/host) but isolates each unit. That's the
  containerized story.

src/content/docs/whp/getting-started/what-is-containerized-hosting.mdx

@@ -9,7 +9,11 @@ Containerized hosting means your site lives in its own lightweight, isolated env
 
 ## An analogy
 
-Think of a shared house with one kitchen versus an apartment building. **Shared hosting** is the house: lots of people share the same kitchen, and when one person leaves dishes in the sink, everyone notices. **Containerized hosting** gives you your own apartment, with your own kitchen, in the same building — you still benefit from the shared infrastructure (heat, security, plumbing), but day-to-day you're not stepping on anyone else's mess.
+Think of an **apartment** versus a **townhome in a gated community**.
+
+**Shared hosting** is the apartment. You have your own unit, but the walls are thin. When the neighbour upstairs hosts a party, you hear it. When someone two doors down cooks something pungent, you smell it. You're sharing the same air, the same plumbing risers, the same elevator — so what one tenant does ripples through everyone else's day.
+
+**Containerized hosting** is the townhome in a gated community. You still benefit from shared community resources — the gates, the security, the community centre, the maintained grounds — but you have your own walls, your own kitchen, your own front door. Whatever the neighbouring townhome does inside their walls stays inside their walls. You only feel the upside of being in the community, not the noise.
 
 ## How it compares to shared hosting