By default, the template URL is restricted to the same domain and protocol as the application document. This is done by calling $sce.getTrustedResourceUrl on it. To load templates from other domains or protocols you may either whitelist them or wrap them as trusted values. Refer to Angular's Strict Contextual Escaping.
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使用ng-include引入的文件必须是同一个域名下，所以想要实现的可能需要另辟蹊径了
默认是同源策略，如果你想加载其他不在同一个域的资源，你需要了解 $sce，设置白名单
这是官网一段描述