General disclaimer and notes on coding style, structure and security.
These articles and examples are designed to demonstrate concepts and cloud related topics, not deliver fully built or tested solutions.
In particular :
Most samples have no specific authentication or security management functionality.
Simple and easily understood architectures are favored over more complex ones with significant prerequisite knowledge.
The code samples are generally not testing for edge cases, input validation, etc
Where HTML or JavaScript is shown it is kept simple with no particular JS frameworks in use.
In summary : Use the concepts but incorporate into your own well deigned systems.