[TASK] Instruction how to add new category

README.md

@@ -86,6 +86,12 @@ Execute mySql command with your values:
 
 	INSERT INTO user (name, role, token) VALUES ("userName", "roleAdmin", "secretToken");
 
+#### Add categories to database
+
+Execute mySql INSERT command. Example of adding new category named "Functions":
+
+	INSERT INTO category (name) VALUES ("Functions");
+
 ### 4. Testing
 
 #### See list of all REST API routs