Added dummy content and deployment things

src/components/card/card.css

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+:host {
+  display: block;
+}
+
+:host(.card) {
+  display: block;
+  padding: 1.2rem;
+  border: 1px solid #30363d;
+  border-radius: 14px;
+  background: #161b22;
+}

src/components/card/card.html

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+<ng-content></ng-content>
+

src/components/card/card.ts

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+import { Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'app-card',
+  imports: [],
+  templateUrl: './card.html',
+  styleUrl: './card.css',
+  host: {
+    '[class]': 'hostClassName',
+  },
+})
+export class CardComponent {
+  @Input() cardClass = '';
+
+  get hostClassName(): string {
+    return this.cardClass ? `card ${this.cardClass}` : 'card';
+  }
+}
+