Move swagger-ui under /api/v1 (#2746)

* Move swagger interface under /api/v1

* Update swagger-ui

* Add /api/swagger and prepare for multiple api version

* Update test links

* Fix footer link

templates/base/footer.tmpl

@@ -23,7 +23,7 @@
 					</div>
 				</div>
 				<a href="{{AppSubUrl}}/vendor/librejs.html" data-jslicense="1">Javascript licenses</a>
-				<a href="{{AppSubUrl}}/swagger">API</a>
+				<a href="{{AppSubUrl}}/api/swagger">API</a>
 				<a target="_blank" rel="noopener" href="https://gitea.io">{{.i18n.Tr "website"}}</a>
 				{{if (or .ShowFooterVersion .PageIsAdmin)}}<span class="version">{{GoVer}}</span>{{end}}
 			</div>

templates/swagger.tmpl

@@ -11,15 +11,15 @@
   <style>
     html
     {
-        box-sizing: border-box;
-        overflow: -moz-scrollbars-vertical;
-        overflow-y: scroll;
+      box-sizing: border-box;
+      overflow: -moz-scrollbars-vertical;
+      overflow-y: scroll;
     }
     *,
     *:before,
     *:after
     {
-        box-sizing: inherit;
+      box-sizing: inherit;
     }
 
     body {
@@ -70,11 +70,13 @@
 <script src="{{AppSubUrl}}/vendor/assets/swagger-ui/swagger-ui-bundle.js"> </script>
 <script src="{{AppSubUrl}}/vendor/assets/swagger-ui/swagger-ui-standalone-preset.js"> </script>
 <script>
+
 window.onload = function() {
   // Build a system
   const ui = SwaggerUIBundle({
-    url: "{{AppUrl}}swagger.v1.json",
+    url: "{{AppUrl}}swagger.{{.APIJSONVersion}}.json",
     dom_id: '#swagger-ui',
+    deepLinking: true,
     presets: [
       SwaggerUIBundle.presets.apis,
       SwaggerUIStandalonePreset