v2: roll (#280)

* ux: delete flow

* style: small tweaks in interface

* refactor: gracefully quit on error

* fix: logic around updating events

* chore: cleanup dictionary

* refactor: improve DX on creating aux files

* fix: safe destructure function return

* refactor: safe handling of falsy timer values

* fix: improve ux on stopping roll mode

* chore: upgrade deps

* feat: roll mode

* refactor: remove unused

server/package.json

@@ -26,7 +26,7 @@
     "supertest": "^6.2.2"
   },
   "scripts": {
-    "setup": "yarn install && yarn setdb && yarn addversion",
+    "postinstall": "yarn setdb && yarn addversion",
     "addversion": "node -p \"'export const ONTIME_VERSION = ' + JSON.stringify(require('./package.json').version) + ';'\" > src/version.js",
     "nodestart": "NODE_ENV=development node src/app.js",
     "setdb": "cp demo-db/db.json src/preloaded-db/db.json",