CRASH: Cannot find module '/app/server/config.mjs' imported from /app/server/index.mjs

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/app/server/config.mjs' imported from /app/server/index.mjs
    at finalizeResolution (node:internal/modules/esm/resolve:275:11)
    at moduleResolve (node:internal/modules/esm/resolve:861:10)
    at defaultResolve (node:internal/modules/esm/resolve:985:11)
    at #cachedDefaultResolve (node:internal/modules/esm/loader:731:20)
    at ModuleLoader.resolve (node:internal/modules/esm/loader:708:38)
    at ModuleLoader.getModuleJobForImport (node:internal/modules/esm/loader:310:38)
    at ModuleJob._link (node:internal/modules/esm/module_job:182:49)