Update Healer Man server

src/game/dungeons/seededBossSelection.ts

@@ -0,0 +1,9 @@
+/** A run id selects one stable boss for saves and every member of a shared party. */
+export function seededBossIndex(seed: string, candidateCount: number): number {
+  let hash = 0x811c9dc5;
+  for (let index = 0; index < seed.length; index += 1) {
+    hash ^= seed.charCodeAt(index);
+    hash = Math.imul(hash, 0x01000193);
+  }
+  return (hash >>> 0) % candidateCount;
+}