Expose more constants via envs

server/room_attacher.js

@@ -3,9 +3,16 @@ const sleep = require("sleep-promise");
 const { clearInterval } = require("timers");
 const fs = require("fs");
 
-const HEADLESS = true;
-const SCREENSHOT_INTERVAL_MS = 3000;
-const USERINFO_INTERVAL_MS = 2000;
+const HEADLESS =
+  process.env.HEADLESS !== undefined ? process.env.HEADLESS : true;
+const SCREENSHOT_INTERVAL_MS =
+  process.env.SCREENSHOT_INTERVAL_MS !== undefined
+    ? process.env.SCREENSHOT_INTERVAL_MS
+    : 3000;
+const USERINFO_INTERVAL_MS =
+  process.env.USERINFO_INTERVAL_MS !== undefined
+    ? process.env.USERINFO_INTERVAL_MS
+    : 2000;
 
 // global state variables, because they are great
 var stateRoomUrl = null;