fix logic and tests, update docker CI file

app/Http/Controllers/Api/Assignment/AssignmentApiController.php

@@ -3,12 +3,12 @@
 namespace App\Http\Controllers\Api\Assignment;
 
 use App\Http\Controllers\Controller;
-use App\Http\Requests\Assignment\StoreAssignmentRequest;
 use App\Http\Resources\Assignment\AssignmentOverviewResource;
 use App\Http\Resources\Assignment\AssignmentSectionResource;
 use App\Services\Assignment\AssignmentService;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Validator;
 
 class AssignmentApiController extends Controller
 {
@@ -29,10 +29,25 @@ class AssignmentApiController extends Controller
         ]);
     }
 
-    public function store(StoreAssignmentRequest $request): JsonResponse
+    public function store(Request $request): JsonResponse
     {
+        $validator = Validator::make($request->all(), [
+            'student_id' => ['required', 'integer', 'exists:students,id'],
+            'class_section_id' => ['required', 'integer', 'exists:classSection,class_section_id'],
+            'semester' => ['required', 'string', 'max:50'],
+            'school_year' => ['required', 'string', 'max:50'],
+            'description' => ['nullable', 'string'],
+        ]);
+
+        if ($validator->fails()) {
+            return response()->json([
+                'message' => 'Validation failed.',
+                'errors' => $validator->errors(),
+            ], 422);
+        }
+
         $assignment = $this->assignmentService->storeAssignment(
-            data: $request->validated(),
+            data: $validator->validated(),
             updatedBy: $request->user()?->id
         );