The twelve-factor app principles are a collection of best practices for building microservices-based cloud-native applications. These applications are modular, scalable, and agile. They are designed to perform at web scale and provide high resiliency.
Terraform is an open source tool created by HashiCorp to define infrastructure as cod using a simple, declarative language called HCL. Terraform is used to deploy and manage infrastructure across a variety of cloud providers & virtualization platforms. It can be used to deploy infrastructure to all major cloud providers such as Azure, AWS, Digital ocean, and virtualization platforms such as VMware, Open stack, and others.
Cross-Origin Resource Sharing or CORS is a mechanism that enables a web browser to perform cross-domain requests. Cross-domain requests are HTTP requests for resources hosted on a different domain than the domain of the resource making the request.
Richardson’s Maturity Model breaks down the journey towards building a truly RESTful API into levels, each adding more constraints and adhering more closely to REST principles.
REST API’s have a very rich vocabulary to communicate a variety of statuses and results. The verbs put, post, update, get and others are used to indicate the action that must be performed. The status indicate the result of the actions performed by the verbs.