js config http endpoint

The starter provides a built-in HTTP endpoint to fetch config for JS SDK. See Inject Correct Authentication Configuration via the config API.

fetch('/wechat/mp/js/config', {
    method: 'get'
}).then((response) => {
    return response.json()
}).then((config)=> {
    wx.config({
        appId: config.appId,
        timestamp: config.timestamp, 
        nonceStr: config.nonceStr, 
        signature: config.signature, 
        jsApiList: [] // Required, list of JS APIs to be used. See Appendix 2 for the list of all JS APIs
    }); 
});