== Java: one jar, run with the driver beside it
45722 laundry-counter.jar
login -> 302 /customers
after a restart (sessions lived in the server's memory):
GET /customers with yesterday's cookie -> 302 /login
== Python: waitress, a production WSGI server, with and without a fixed LAUNDRY_SECRET
login -> 302 /customers
after a restart, same LAUNDRY_SECRET:
GET /customers with yesterday's cookie -> 200 (the grid)
after a restart, LAUNDRY_SECRET not set (a new random key):
GET /customers with yesterday's cookie -> 302 /login
