Create form to create offering

src/Entity/Offering.php

@@ -4,6 +4,7 @@ namespace App\Entity;
 
 use App\Repository\OfferingRepository;
 use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * @ORM\Entity(repositoryClass=OfferingRepository::class)
@@ -31,6 +32,7 @@ class Offering
     /**
      * @ORM\Column(type="string", length=255)
      */
+    #[Assert\NotBlank]
     private $title;
 
     /**
@@ -41,6 +43,7 @@ class Offering
     /**
      * @ORM\Column(type="integer")
      */
+    #[Assert\NotBlank]
     private $zipCode;
 
     /**