fix: use native stockfish binary via debian image

Dockerfile

@@ -1,7 +1,7 @@
-FROM node:lts-alpine3.20
+FROM node:lts-bookworm-slim
 
-# Install git only (stockfish via npm package)
-RUN apk update && apk add --no-cache git
+# Install git and stockfish (native binary)
+RUN apt-get update && apt-get install -y --no-install-recommends git stockfish && rm -rf /var/lib/apt/lists/*
 
 ENV PNPM_HOME=/usr/local/bin
 

server/package.json

@@ -20,7 +20,6 @@
         "nanoid": "^5.0.7",
         "pg": "^8.12.0",
         "socket.io": "^4.7.5",
-        "stockfish": "^16.0.0",
         "xss": "^1.0.15"
     },
     "devDependencies": {

server/src/controllers/stockfish.controller.ts

@@ -1,5 +1,4 @@
 import { spawn, ChildProcess } from "child_process";
-import { createRequire } from "module";
 
 export interface StockfishLevel {
     level: number;
@@ -31,10 +30,7 @@ export class StockfishEngine {
 
     private async init() {
         try {
-            const require = createRequire(import.meta.url);
-            const sfPath: string = require.resolve("stockfish");
-
-            this.process = spawn(process.execPath, [sfPath], {
+            this.process = spawn("stockfish", [], {
                 stdio: ["pipe", "pipe", "pipe"],
             });