- add grocery category

- add Dockerfile

backend/schemas.py

@@ -20,22 +20,41 @@ class Brand(BrandBase):
     class Config:
         from_attributes = True
 
+# Grocery Category schemas
+class GroceryCategoryBase(BaseModel):
+    name: str
+
+class GroceryCategoryCreate(GroceryCategoryBase):
+    pass
+
+class GroceryCategoryUpdate(BaseModel):
+    name: Optional[str] = None
+
+class GroceryCategory(GroceryCategoryBase):
+    id: int
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+    
+    class Config:
+        from_attributes = True
+
 # Grocery schemas
 class GroceryBase(BaseModel):
     name: str
-    category: str
+    category_id: int
 
 class GroceryCreate(GroceryBase):
     pass
 
 class GroceryUpdate(BaseModel):
     name: Optional[str] = None
-    category: Optional[str] = None
+    category_id: Optional[int] = None
 
 class Grocery(GroceryBase):
     id: int
     created_at: datetime
     updated_at: Optional[datetime] = None
+    category: GroceryCategory
     
     class Config:
         from_attributes = True