我的 react webApp 在浏览器控制台中给出了这个错误

Refused to load the font 'data:font/woff;base64,d09........' because it` 
`violates the following Content Security Policy directive: "default-src` `'self'". Note that 'font-src' was not explicitly set, so 'default-src' is used as a fallback.

还：

Refused to connect to 'ws://localhost:3000/sockjs-node/782/oawzy1fx/websocket' because it violates the following Content Security Policy directive: "default-src 'self'". Note that 'connect-src' was not explicitly set, so 'default-src' is used as a fallback.

浏览器控制台截图

index.html有这个元：

<meta http-equiv="Content-Security-Policy" content="img-src 'self' data:; default-src 'self' http://121.0.0:3000/">

WebPack.cofig.js

var debug = process.env.NODE_ENV !== "production";
var webpack = require('webpack');
var path = require('path');

module.exports = {
    context: path.join(__dirname, "./src"),
    devtool: debug ? "inline-sourcemap" : true,
    entry: "../src/index.js",

    module: {
        rules: [
            {
                test: /\.(jpe?g|png|gif|svg|woff|woff2|eot|ttf)$/i,  // a regular expression that catches .js files
                exclude: /node_modules/,
                loader: 'url-loader',
            },
            {
                test: /\.(js|.jsx)$/,
                exclude: /(node_modules|bower_components)/,
                loader: 'babel-loader',
                query: {
                    presets: ['react','es2016', 'stage-0',],
                    plugins: ['react-html-attrs', 'transform-decorators-legacy', 'transform-class-properties'],
                }
            },
            {
                test: /\.css$/,
                use: [
                    "style-loader",
                    {
                        loader: "css-loader",
                    }
                ]
            }
        ]
    },
    resolve: {
        modules: [
            path.join(__dirname, "src"),
            "node_modules",
        ]
    },
    output: {
        path: __dirname + "/public/",
        // publicPath: "/public/",
        filename: "build.js"
    },
    plugins: debug ? [] : [
        new webpack.optimize.DedupePlugin(),
        new webpack.optimize.OccurrenceOrderPlugin(),
        new webpack.optimize.UglifyJsPlugin({ mangle: false, sourcemap: false }),
    ],
    devServer: {
        port: 3000, // most common port
        contentBase: './public',
        inline: true,
        historyApiFallback: true,
    }
};