jhipster: add page (#4047)

Co-authored-by: Zlatan Vasović <zlatanvasovic@gmail.com>
Co-authored-by: Iván Hernández Cazorla <ivan@ivanhercaz.com>
Co-authored-by: Andrik Albuquerque <andrik.albuquerque@gmail.com>

pages/common/jhipster.md

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+# jhipster
+
+> Web application generator using either monolithic or microservices architecture.
+> More information: <https://www.jhipster.tech/>.
+
+- Generate a simple full-stack project (monolithic or microservices):
+
+`jhipster`
+
+- Generate a simple frontend project:
+
+`jhipster --skip-server`
+
+- Generate a simple backend project:
+
+`jhipster --skip-client`
+
+- Apply lastest JHipster updates to the project:
+
+`jhipster upgrade`
+
+- Add a new entity to a generated project:
+
+`jhipster entity {{entity_name}}`
+
+- Import a JDL file to configure your application (see: https://start.jhipster.tech/jdl-studio/):
+
+`jhipster import-jdl {{first_file.jh second_file.jh ... n_file.jh}}`
+
+- Generate a CI/CD pipeline for your application:
+
+`jhipster ci-cd`
+
+- Generate a Kubernetes configuration for your application:
+
+`jhipster kubernetes`