Add ping api

src/server/api/endpoints/ping.ts

@@ -0,0 +1,27 @@
+import define from '../define';
+
+export const meta = {
+	requireCredential: false as const,
+
+	tags: ['meta'],
+
+	params: {
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		properties: {
+			pong: {
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
+			},
+		}
+	}
+};
+
+export default define(meta, async () => {
+	return {
+		pong: Date.now(),
+	};
+});