add jsonview resource files.

src/DotNetCore.CAP/Dashboard/Content/css/jsonview.min.css

+@charset "UTF-8";.jsonview{font-family:monospace;font-size:1.1em;white-space:pre-wrap}.jsonview .prop{font-weight:700;text-decoration:none;color:#000}.jsonview .null,.jsonview .undefined{color:red}.jsonview .bool,.jsonview .num{color:#00f}.jsonview .string{color:green;white-space:pre-wrap}.jsonview .string.multiline{display:inline-block;vertical-align:text-top}.jsonview .collapser{position:absolute;left:-1em;cursor:pointer}.jsonview .collapsible{transition:height 1.2s;transition:width 1.2s}.jsonview .collapsible.collapsed{height:.8em;width:1em;display:inline-block;overflow:hidden;margin:0}.jsonview .collapsible.collapsed:before{content:"…";width:1em;margin-left:.2em}.jsonview .collapser.collapsed{transform:rotate(0)}.jsonview .q{display:inline-block;width:0;color:transparent}.jsonview li{position:relative}.jsonview ul{list-style:none;margin:0 0 0 2em;padding:0}.jsonview h1{font-size:1.2em}
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src/DotNetCore.CAP/Dashboard/Content/js/jsonview.min.js

+!function(e){var t,n,r,l,o;return o=["object","array","number","string","boolean","null"],r=function(){function t(e){null==e&&(e={}),this.options=e}return t.prototype.htmlEncode=function(e){return null!==e?e.toString().replace(/&/g,"&amp;").replace(/"/g,"&quot;").replace(/</g,"&lt;").replace(/>/g,"&gt;"):""},t.prototype.jsString=function(e){return e=JSON.stringify(e).slice(1,-1),this.htmlEncode(e)},t.prototype.decorateWithSpan=function(e,t){return'<span class="'+t+'">'+this.htmlEncode(e)+"</span>"},t.prototype.valueToHTML=function(t,n){var r;if(null==n&&(n=0),r=Object.prototype.toString.call(t).match(/\s(.+)]/)[1].toLowerCase(),this.options.strict&&!e.inArray(r,o))throw new Error(""+r+" is not a valid JSON value type");return this[""+r+"ToHTML"].call(this,t,n)},t.prototype.nullToHTML=function(e){return this.decorateWithSpan("null","null")},t.prototype.undefinedToHTML=function(){return this.decorateWithSpan("undefined","undefined")},t.prototype.numberToHTML=function(e){return this.decorateWithSpan(e,"num")},t.prototype.stringToHTML=function(e){var t,n;return/^(http|https|file):\/\/[^\s]+$/i.test(e)?'<a href="'+this.htmlEncode(e)+'"><span class="q">"</span>'+this.jsString(e)+'<span class="q">"</span></a>':(t="",e=this.jsString(e),this.options.nl2br&&(n=/([^>\\r\\n]?)(\\r\\n|\\n\\r|\\r|\\n)/g,n.test(e)&&(t=" multiline",e=(e+"").replace(n,"$1<br />"))),'<span class="string'+t+'">"'+e+'"</span>')},t.prototype.booleanToHTML=function(e){return this.decorateWithSpan(e,"bool")},t.prototype.arrayToHTML=function(e,t){var n,r,l,o,i,s,a,p;for(null==t&&(t=0),r=!1,i="",o=e.length,l=a=0,p=e.length;p>a;l=++a)s=e[l],r=!0,i+="<li>"+this.valueToHTML(s,t+1),o>1&&(i+=","),i+="</li>",o--;return r?(n=0===t?"":" collapsible",'[<ul class="array level'+t+n+'">'+i+"</ul>]"):"[ ]"},t.prototype.objectToHTML=function(e,t){var n,r,l,o,i,s,a;null==t&&(t=0),r=!1,i="",o=0;for(s in e)o++;for(s in e)a=e[s],r=!0,l=this.options.escape?this.jsString(s):s,i+='<li><a class="prop" href="javascript:;"><span class="q">"</span>'+l+'<span class="q">"</span></a>: '+this.valueToHTML(a,t+1),o>1&&(i+=","),i+="</li>",o--;return r?(n=0===t?"":" collapsible",'{<ul class="obj level'+t+n+'">'+i+"</ul>}"):"{ }"},t.prototype.jsonToHTML=function(e){return'<div class="jsonview">'+this.valueToHTML(e)+"</div>"},t}(),"undefined"!=typeof module&&null!==module&&(module.exports=r),n=function(){function e(){}return e.bindEvent=function(e,t){var n;return e.firstChild.addEventListener("click",function(e){return function(n){return e.toggle(n.target.parentNode.firstChild,t)}}(this)),n=document.createElement("div"),n.className="collapser",n.innerHTML=t.collapsed?"+":"-",n.addEventListener("click",function(e){return function(n){return e.toggle(n.target,t)}}(this)),e.insertBefore(n,e.firstChild),t.collapsed?this.collapse(n):void 0},e.expand=function(e){var t,n;return n=this.collapseTarget(e),""!==n.style.display?(t=n.parentNode.getElementsByClassName("ellipsis")[0],n.parentNode.removeChild(t),n.style.display="",e.innerHTML="-"):void 0},e.collapse=function(e){var t,n;return n=this.collapseTarget(e),"none"!==n.style.display?(n.style.display="none",t=document.createElement("span"),t.className="ellipsis",t.innerHTML=" &hellip; ",n.parentNode.insertBefore(t,n),e.innerHTML="+"):void 0},e.toggle=function(e,t){var n,r,l,o,i,s;if(null==t&&(t={}),l=this.collapseTarget(e),n="none"===l.style.display?"expand":"collapse",t.recursive_collapser){for(r=e.parentNode.getElementsByClassName("collapser"),s=[],o=0,i=r.length;i>o;o++)e=r[o],s.push(this[n](e));return s}return this[n](e)},e.collapseTarget=function(e){var t,n;return n=e.parentNode.getElementsByClassName("collapsible"),n.length?t=n[0]:void 0},e}(),t=e,l={collapse:function(e){return"-"===e.innerHTML?n.collapse(e):void 0},expand:function(e){return"+"===e.innerHTML?n.expand(e):void 0},toggle:function(e){return n.toggle(e)}},t.fn.JSONView=function(){var e,o,i,s,a,p,c;return e=arguments,null!=l[e[0]]?(a=e[0],this.each(function(){var n,r;return n=t(this),null!=e[1]?(r=e[1],n.find(".jsonview .collapsible.level"+r).siblings(".collapser").each(function(){return l[a](this)})):n.find(".jsonview > ul > li .collapsible").siblings(".collapser").each(function(){return l[a](this)})})):(s=e[0],p=e[1]||{},o={collapsed:!1,nl2br:!1,recursive_collapser:!1,escape:!0,strict:!1},p=t.extend(o,p),i=new r(p),"[object String]"===Object.prototype.toString.call(s)&&(s=JSON.parse(s)),c=i.jsonToHTML(s),this.each(function(){var e,r,l,o,i,s;for(e=t(this),e.html(c),l=e[0].getElementsByClassName("collapsible"),s=[],o=0,i=l.length;i>o;o++)r=l[o],"LI"===r.parentNode.nodeName?s.push(n.bindEvent(r.parentNode,p)):s.push(void 0);return s}))}}(jQuery);
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