Learnlog

Another aspect of config management is grouping. Sometimes apps batch config into named groups (often called “environments”) named after specific deploys, such as the development, test, and production environments

The principle of Port Binding asserts that a service or application is identifiable to the network by port number, not a domain name. The reasoning is that domain names and associated IP addresses can be assigned on-the-fly by manual manipulation and automated service discovery mechanisms. Thus, using them as a point of reference is unreliable. However, exposing a service or application to the network according to port number is more reliable and easier to manage

they are are easy to change between deploys without changing any code

because the key and value both have to be plain text, it discourages adding more complicated things as config settings when they really ought not to need to be.

can be easily and reliably read using any of a variety of languages (including shell scripts and the like) without complicated parsing code or library dependencies

Using the constraints features UniqueConstraint is preferred over unique_together.

setup: The function with your Effect’s logic. Your setup function may also optionally return a cleanup function. When your component is added to the DOM, React will run your setup function. After every re-render with changed dependencies, React will first run the cleanup function (if you provided it) with the old values, and then run your setup function with the new values. After your component is removed from the DOM, React will run your cleanup function.

Context is a feature of React, a popular JavaScript library for building user interfaces, that enables components to share data without passing props down manually at every level of the component tree.

You can use all the context APIs, such as createContext, useContext, and Provider, in your Client Components.

createContext lets you create a context that components can provide or read.