Full refactor to Typescript

client/api.tsx

@@ -0,0 +1,18 @@
+export const server = {
+    async get(url: string) {
+        const res = await fetch(url, { credentials: 'include' })
+        return await res.json()
+    },
+    async post<T>(url: string, body?: T) {
+        const res = await fetch(url, {
+            method: 'POST',
+            credentials: 'include',
+            headers: {
+                'Content-Type': 'application/json',
+            },
+            body: JSON.stringify(body),
+        })
+
+        return await res.json()
+    },
+}