Add error page and login error redirection

js/src/views/Error.vue

@@ -0,0 +1,25 @@
+<template>
+  <div v-if="code === ErrorCode.REGISTRATION_CLOSED">
+    <translate>Registration is currently closed.</translate>
+  </div>
+
+  <div v-else>
+    <translate>Unknown error.</translate>
+  </div>
+</template>
+
+<script lang="ts">
+  import { Component, Vue } from 'vue-property-decorator';
+  import { ErrorCode } from '@/types/error-code.model';
+
+  @Component
+  export default class ErrorPage extends Vue {
+    code: ErrorCode | null = null;
+
+    ErrorCode = ErrorCode;
+
+    mounted() {
+      this.code = this.$route.query[ 'code' ] as ErrorCode;
+    }
+  }
+</script>