Improve examples section

examples/minimal/index.js

@@ -0,0 +1,27 @@
+const { drawCard, Text } = require('discord-welcome-card');
+const { writeFile } = require('fs/promises');
+const { join } = require('path');
+const { member, avatar } = require('../mock');
+
+async function run() {
+  const image = await drawCard({
+    theme: 'dark',
+    blur: false,
+    rounded: true,
+    text: {
+      title: new Text('Welcome!', 240, 70).setFontSize(32),
+      text: new Text(member.user.tag, 240, 150).setFontSize(64),
+      color: `#DDDDDD`,
+      font: 'Panton Black Caps',
+    },
+    avatar: {
+      image: avatar,
+      outlineWidth: 5,
+      outlineColor: `#DDDDDD`,
+    },
+    background: join(__dirname, './background.png'),
+  });
+
+  writeFile(join(__dirname, './card.png'), image);
+}
+run();

examples/mock.js

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+const { join } = require('path');
+const path = (...s) => join(__dirname, ...s);
+
+const avatar = path('./avatar.png');
+
+/** @type {import('discord-welcome-card').GuildMemberLike} */
+const member = {
+  user: {
+    tag: 'Dyno#3861',
+    displayAvatarURL: ({ format }) => avatar,
+  },
+  guild: {
+    memberCount: 420,
+  },
+};
+
+module.exports = {
+  member,
+  avatar,
+};