feat(frontend): POST for images

frontend/src/hooks.server.ts

@@ -0,0 +1,8 @@
+import { ConvexHttpClient } from 'convex/browser';
+import { PUBLIC_CONVEX_URL } from '$env/static/public';
+import type { Handle } from '@sveltejs/kit';
+
+export const handle: Handle = async ({ event, resolve }) => {
+	event.locals.convex = new ConvexHttpClient(PUBLIC_CONVEX_URL);
+	return resolve(event);
+};