adding gorm

backend/models/post.go

@@ -0,0 +1,11 @@
+package models
+
+import "gorm.io/gorm"
+
+type Post struct {
+	gorm.Model        // includes ID, CreatedAt, UpdatedAt, DeletedAt
+	Title      string `gorm:"not null"`
+	Content    string `gorm:"type:text; not null"`
+	AuthorID   uint   // foreign key to User
+	Author     User   `gorm:"constraint:OnUpdate:CASCADE,OnDelete:SET NULL;"` // optional relation
+}