feat(docs): added USDA food API

README.md

@@ -829,6 +829,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Edamam nutrition](https://developer.edamam.com/edamam-docs-nutrition-api) | Nutrition Analysis | `apiKey` | Yes | Unknown |
 | [Edamam recipes](https://developer.edamam.com/edamam-docs-recipe-api) | Recipe Search | `apiKey` | Yes | Unknown |
 | [Foodish](https://github.com/surhud004/Foodish#readme) | Random pictures of food dishes | No | Yes | Yes |
+| [FoodData Central](https://fdc.nal.usda.gov/api-guide.html) | USDA food nutrient data | Yes | Yes | No |
 | [Fruityvice](https://www.fruityvice.com) | Data about all kinds of fruit | No | Yes | Unknown |
 | [Kroger](https://developer.kroger.com/reference) | Supermarket Data | `apiKey` | Yes | Unknown |
 | [LCBO](https://lcboapi.com/) | Alcohol | `apiKey` | Yes | Unknown |