Missing info about how to apply licenses

[duartemtorres]

Each license page has a section named "How to apply this license" typically saying:

Create a text file (typically named LICENSE or LICENSE.txt) in the root of your source code and copy the text of the license into the file. Replace [year] with the current year and [fullname] with the name (or names) of the copyright holders.

Some licenses like the MIT License include a step to replace the copyright templates with your own identifying information. Something like:

Replace [year] with the current year and [fullname] with the name (or names) of the copyright holders.

However, the Apache License 2.0 is missing this. I do not know if any other license has the same issue but it would be useful to have this to guide newbies.