restore composer.json, add mysqli extension

app/Models/ServiceProblem.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * @package App\Models
+ * @property int $id
+ * @property int $service_id
+ * @property int $problem_id
+ */
+class ServiceProblem extends Model
+{
+    use HasFactory;
+
+    protected $table = 'service_problems';
+
+    protected $fillable = [
+        'service_id',
+        'problem_id',
+    ];
+
+    public function service()
+    {
+        return $this->belongsTo(Service::class);
+    }
+
+    public function problem()
+    {
+        return $this->belongsTo(Problem::class);
+    }
+}