Volume: anexe um volume em /data (cache de mídia). Sem ele a mídia é baixada de novo do WhatsApp.
Domínio: gere um domínio público. O health check é GET /health.
Réplicas: mantenha 1. Uma sessão de WhatsApp não pode estar conectada em duas instâncias ao mesmo tempo.
Abra https://<domínio>/dashboard/, entre com a chave e leia o QR de cada sessão.
Atualizar
Cada push na branch ligada faz um redeploy. As sessões voltam sozinhas porque as chaves estão no Postgres; não precisa de novo QR.
Cuidados
O whatsmeow é não oficial: risco de banimento do número.
A Railway não expõe UDP de entrada; a ligação por voz usa só UDP de saída. Valide com uma ligação de teste antes de depender dela.
Trocar o código antigo pelo novo migra o schema do whatsmeow (16→18). O código antigo continua subindo sobre o schema novo e a sessão volta sem QR (testado); mesmo assim, tire um pg_dump antes.
Backup: faça dump do Postgres. Perder o banco = reler todos os QRs.
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_createMdxContent(props){const _components={a:`a`,code:`code`,li:`li`,ol:`ol`,p:`p`,strong:`strong`,tbody:`tbody`,td:`td`,th:`th`,thead:`thead`,tr:`tr`,ul:`ul`,..._provideComponents(),...props.components},{Heading,Table,Warning}=_components;if(!Heading)_missingMdxReference(`Heading`,true);if(!Table)_missingMdxReference(`Table`,true);if(!Warning)_missingMdxReference(`Warning`,true);return _jsxs(_Fragment,{children:[_jsx(Warning,{children:_jsx(_components.p,{children:`O deploy de produção só acontece com o OK do responsável. 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A Railway lê `,_jsx(_components.code,{children:`railway.json`}),` e usa o `,_jsx(_components.code,{children:`Dockerfile`}),`.`]}),`\n`]}),`\n`,_jsxs(_components.li,{children:[`\n`,_jsx(_components.p,{children:_jsx(_components.strong,{children:`Variáveis do serviço:`})}),`\n`,_jsxs(Table,{children:[_jsx(_components.thead,{children:_jsxs(_components.tr,{children:[_jsx(_components.th,{children:`Variável`}),_jsx(_components.th,{children:`Valor`})]})}),_jsxs(_components.tbody,{children:[_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`DATABASE_URL`})}),_jsx(_components.td,{children:_jsx(_components.code,{children:\"${{Postgres.DATABASE_URL}}\"})})]}),_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`ZAPMEOW_API_KEY`})}),_jsx(_components.td,{children:`chave aleatória de 32+ caracteres`})]}),_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`PUBLIC_URL`})}),_jsx(_components.td,{children:_jsx(_components.code,{children:`https://\u003cdomínio-do-serviço>`})})]}),_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`DATA_DIR`})}),_jsx(_components.td,{children:_jsx(_components.code,{children:`/data`})})]}),_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`RAILWAY_RUN_UID`})}),_jsxs(_components.td,{children:[_jsx(_components.code,{children:`0`}),` (o volume nasce como root; o processo roda como `,_jsx(_components.code,{children:`zm`}),` e sem isso não grava mídia)`]})]}),_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`ZAPMEOW_ADMIN_KEY`})}),_jsxs(_components.td,{children:[`chave aleatória de 32+ caracteres, diferente da `,_jsx(_components.code,{children:`ZAPMEOW_API_KEY`}),` (liga `,_jsx(_components.code,{children:`/admin`}),`, tenants e o painel)`]})]}),_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`ZAPMEOW_MASTER_KEY`})}),_jsxs(_components.td,{children:[_jsx(_components.code,{children:`openssl rand -hex 32`}),` (cifra o cofre; `,_jsx(_components.strong,{children:`guarde uma cópia`}),`: sem ela os segredos gravados não abrem)`]})]}),_jsxs(_components.tr,{children:[_jsx(_components.td,{children:_jsx(_components.code,{children:`ZAPMEOW_VOICE`})}),_jsxs(_components.td,{children:[_jsx(_components.code,{children:`1`}),` só quando for testar ligação; veja o `,_jsx(_components.a,{href:`/guides/voice`,children:`guia`})]})]})]})]}),`\n`]}),`\n`,_jsxs(_components.li,{children:[`\n`,_jsxs(_components.p,{children:[_jsx(_components.strong,{children:`Volume:`}),` anexe um volume em `,_jsx(_components.code,{children:`/data`}),` (cache de mídia). 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