Update page Title for SEO.

frontend/src/app/services/seo.service.ts

@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+import { Title, Meta } from '@angular/platform-browser';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SeoService {
+  defaultTitle = 'mempool - Bitcoin Explorer';
+
+  constructor(
+    private titleService: Title,
+  ) { }
+
+  setTitle(newTitle: string) {
+    this.titleService.setTitle(newTitle + ' - ' + this.defaultTitle);
+  }
+
+  resetTitle() {
+    this.titleService.setTitle(this.defaultTitle);
+  }
+}