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+// pm2 process config for chess-io.
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+//
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+// CommonJS (.cjs) on purpose: package.json has "type": "module", so a plain
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+// ecosystem.config.js would be parsed as ESM and `module.exports` would throw.
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+// pm2 reads .cjs fine.
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+//
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+// pm2 start ecosystem.config.cjs
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+// pm2 logs chess-io --lines 5 # confirm basePath":"/chess"
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+// pm2 save # remember this process across restarts
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+// pm2 startup # prints a sudo command to enable on boot
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+//
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+module.exports = {
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+ apps: [
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+ {
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+ name: 'chess-io',
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+ script: 'server.js',
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+ cwd: __dirname,
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+
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+ // Single process, fork mode -- NOT cluster. The `games` object lives in
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+ // memory in one process; multiple workers would each hold a different
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+ // slice, so a player routed to the wrong worker sees "token-invalid", and
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+ // socket.io would additionally need a shared adapter + sticky sessions.
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+ // One process is correct for this app.
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+ instances: 1,
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+ exec_mode: 'fork',
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+
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+ env: {
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+ NODE_ENV: 'production',
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+ PORT: 8181,
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+ BASE_PATH: '/chess',
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+ TRUST_PROXY: 1,
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+ // DAW_ORIGIN is intentionally omitted -- it is a local-dev-only shim for
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+ // the shared chrome and must stay unset in production.
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+ },
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+ },
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+ ],
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+};
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