Your codebase likely has a lot of busy hands. Imagine if every single developer cloned the entire master branch and merged their changes without any testing: the quality and maintenance of code would be a disaster. This is where continuous integration (CI) and continuous delivery (CD) come in.
Clouds and cloud computing have become essential when it comes to IT infrastructures. Public clouds usually have tons of space available and they are often recommended when pursuing software development and other types of collaborative projects, like web app development.