add loading date for container table

database/migrations/2021_07_21_110190_create_containers_table.php

@@ -22,6 +22,7 @@ class CreateContainersTable extends Migration
             $table->string('container_number')->nullable();
             $table->integer('container_type')->default(ContainerTypes::FORTY_FEET_DRY_CONTAINER);
             $table->string('seal_reference')->nullable();
+            $table->timestamp('loading_date')->nullable();
             $table->integer('status')->default(ApprovalStatus::PENDING_SUBMISSION);
             $table->softDeletes();
             $table->timestamps();