JAVASCRIPT J18 - DELIVER THE EXISTING J17 APP
Open a terminal in extracted companion/javascript/j18.
Run: python run_checks.py
Windows alternative: py run_checks.py
Node >=22 must already be installed.
This runs the existing J17 server and client tests.
Read RUNBOOK.txt for startup and manual browser checks.
Start the actual app from sibling j17: python server.py
Open the local address it prints.
CHANGE_BRIEF.txt proposes a new exercise; its minimum filter is not
implemented in the supplied J17 app.
Answers: ../solutions/J18.md
