fix(landing): add contact section and fix landing image

docs/app/pages/home/contact-form/contact.component.html

@@ -0,0 +1,6 @@
+<div class="contact">
+  <h1>Need customization?</h1>
+  <p>Thinking of building something outstanding based on ngx-admin or just need some Angular/React experts?</p>
+  <a class="btn btn-demo" href="https://hubs.ly/H0nJf_b0"
+     target="_blank">Contact us</a>
+</div>

docs/app/pages/home/contact-form/contact.component.scss

@@ -0,0 +1,53 @@
+@import '../../../@theme/styles/themes';
+@import '~@nebular/theme/styles/global/breakpoints';
+
+@include nb-install-component() {
+  $color-active: nb-theme(color-active-fg);
+
+  .contact {
+    text-align: center;
+    margin-bottom: 4rem;
+  }
+
+  h1 {
+    font-family: 'Helvetica Neue Bold', sans-serif;
+    font-size: 2.5rem;
+    color: $color-active;
+    margin: 0;
+  }
+
+  p {
+    font-family: unquote('"Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif'), sans-serif;
+    font-size: 1.5rem;
+    line-height: 1.5;
+    margin-top: 1.5rem;
+    margin-bottom: 1.5rem;
+  }
+
+  .btn {
+    font-family: nb-theme(font-main), sans-serif;
+    border-radius: 3px;
+    border: none;
+    background: #ffffff;
+    color: #000000;
+    box-shadow: nb-theme(shadow-default);
+    cursor: pointer;
+    text-transform: uppercase;
+
+    &.btn-demo {
+      margin-top: 0.375rem;
+      padding: 1.125rem 6.25rem;
+      color: #ffffff;
+      background-color: nb-theme(color-active-fg);
+      box-shadow: nb-theme(shadow-btn);
+    }
+
+    &:hover {
+      box-shadow: nb-theme(shadow-hover-green-btn);
+    }
+
+    &:active {
+      box-shadow: nb-theme(shadow-active-green-btn);
+    }
+  }
+}

docs/app/pages/home/contact-form/contact.component.ts

@@ -0,0 +1,13 @@
+import {Component} from '@angular/core';
+
+@Component({
+  selector: 'ngx-contact-form',
+  templateUrl: './contact.component.html',
+  styleUrls: ['./contact.component.scss'],
+})
+export class ContactFormComponent {
+  constructor() {
+
+  }
+
+}