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module.exports = { ... // devServer設定 devServer: { contentBase: path.join(__dirname, "dist"), ... }, }; [webpack-cli] Invalid options object. Dev Server has been initialized using an options object that does not match the API schema. - options has an unknown property 'contentBase'. These properties are valid: object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyAp