docker-context: add page (#15070)

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/docker-context.md

@@ -0,0 +1,20 @@
+# docker context
+
+> Switch between contexts to manage multiple Docker environments.
+> More information: <https://docs.docker.com/reference/cli/docker/context/>.
+
+- Create a context using a specific Docker endpoint:
+
+`docker context create {{my_context}} --docker "host={{tcp://remote-host:2375}}"`
+
+- Create a context based on the `DOCKER_HOST` environment variable:
+
+`docker context create {{my_context}}`
+
+- Switch to a context:
+
+`docker context use {{my_context}}`
+
+- List all contexts:
+
+`docker context ls`