feat(api): ✨ Add safeguard when using formdata without a boundary

middlewares/boundary-check.ts

@@ -0,0 +1,18 @@
+import { errorResponse } from "@response";
+import { createMiddleware } from "hono/factory";
+
+export const boundaryCheck = createMiddleware(async (context, next) => {
+    // Checks that FormData boundary is present
+    const contentType = context.req.header("content-type");
+
+    if (contentType?.includes("multipart/form-data")) {
+        if (!contentType.includes("boundary")) {
+            return errorResponse(
+                "You are sending a request with a multipart/form-data content type but without a boundary. Please include a boundary in the Content-Type header. For more information, visit https://stackoverflow.com/questions/3508338/what-is-the-boundary-in-multipart-form-data",
+                400,
+            );
+        }
+    }
+
+    await next();
+});