web-ui: Add API url to the environments

web-ui/src/environments/environment.prod.ts

@@ -1,3 +1,7 @@
 export const environment = {
-  production: true
+  production: true,
+  api: {
+    // TODO: replace with the correct value
+    url: 'http://localhost:9000'
+  }
 };

web-ui/src/environments/environment.ts

@@ -4,5 +4,8 @@
 // The list of which env maps to which file can be found in `.angular-cli.json`.
 
 export const environment = {
-  production: false
+  production: false,
+  api: {
+    url: 'http://localhost:9000'
+  }
 };