New e2e test suite (#555)

* add @cypress/schematic as a dev dependency

* replace protractor with cypress

* remove the boilerplate test

* add the cypress-wait-until helper library

* add cypress-wait-until to all tests

* add signet to stg proxy config

* add proxy config for production

* add environment configs to angular.json

* update e2e target to use the production proxy

* update serve and start scripts to use the new environment config

* add the concurrently lib to the dev dependencies

* fix missing import

* ignore videos and screenshots saved by the e2e suite

* add fixtures for the tests

* update cypress npm scripts to use concurrently

* add some e2e tests

frontend/proxy.stg.conf.json

@@ -31,6 +31,23 @@
     },
     "timeout": 3600000
   },
+  "/signet/api/v1/ws": {
+    "target": "https://mempool.ninja/signet",
+    "secure": false,
+    "ws": true,
+    "pathRewrite": {
+      "^/signet/api": "/api/v1/ws"
+    }
+  },
+  "/signet/api/v1/*": {
+    "target": "https://mempool.ninja/signet",
+    "secure": false,
+    "changeOrigin": true,
+    "pathRewrite": {
+      "^/signet/api/v1": "/api/v1"
+    },
+    "timeout": 3600000
+  },
   "/bisq/api/v1/ws": {
     "target": "https://mempool.ninja/bisq",
     "secure": false,