frontend.zip now holds the frontend files at their root (dc/dc #147, released in
v7.14.2), so unzipping no longer produces a client/dist folder to navigate into.
Step 2 now says to create the app folder and unzip the archive into it, naming
the file that should end up there. Step 3's URL example matches the folder the
reader created, and the intro line drops "to the root of" - it contradicted the
subfolder instruction directly below it.