UI server refactoring (#5580)

* Full API in Authenticated WS server.

* Replacing UI server with Hyper.

* Solving CLI, RPCs and tests.

* Porting signer tests.

* Fixing origin recognition for dapps/rpc.

* Fixing tests. Adding parity-rpc-client to test.

* Dapps exposed as RPC method.

* JS code to support new connection scheme.

* Fixing dapps tests.

* Updating allowed origins/hosts to support web3.site.

* Fixing tests, fixing UI.

* Fixing tests.

* Removing invalid tests.

* Fixing merge.

* 404 fallback for UI

* Improve ContentFetcher constructor readability.

* Naming.

* Update .gitlab-ci.yml

fix CI lint error

* Fixing tests and linting issues.

* Fixing new tests.

* UI hosts.

* Submodules fix.

js/src/util/dapps.js

@@ -25,21 +25,6 @@ import builtinJson from '~/views/Dapps/builtin.json';
 
 const builtinApps = builtinJson.filter((app) => app.id);
 
-function getHost (api) {
-  const host = process.env.DAPPS_URL ||
-    (
-      process.env.NODE_ENV === 'production'
-      ? api.dappsUrl
-      : ''
-    );
-
-  if (host === '/') {
-    return '';
-  }
-
-  return host;
-}
-
 export function subscribeToChanges (api, dappReg, callback) {
   return dappReg
     .getContract()
@@ -105,12 +90,7 @@ export function fetchBuiltinApps () {
 }
 
 export function fetchLocalApps (api) {
-  return fetch(`${getHost(api)}/api/apps`)
-    .then((response) => {
-      return response.ok
-        ? response.json()
-        : [];
-    })
+  return api.parity.dappsList()
     .then((apps) => {
       return apps
         .map((app) => {
@@ -195,7 +175,7 @@ export function fetchManifest (api, manifestHash) {
   }
 
   return fetch(
-      `${getHost(api)}/api/content/${manifestHash}/`,
+      `/api/content/${manifestHash}/`,
       { redirect: 'follow', mode: 'cors' }
     )
     .then((response) => {