docker: simplify examples (#2597)

pages/common/docker.md

@@ -4,36 +4,32 @@
 
 - List currently running docker containers:
 
-`docker container ls`
+`docker ps`
 
 - List all docker containers (running and stopped):
 
-`docker container ls -a`
+`docker ps -a`
 
 - Start a container from an image, with a custom name:
 
-`docker container run --name={{container_name}} {{image}}`
+`docker run --name {{container_name}} {{image}}`
 
 - Start or stop an existing container:
 
-`docker container {{start|stop}} {{container_name}}`
+`docker {{start|stop}} {{container_name}}`
 
 - Pull an image from a docker registry:
 
 `docker pull {{image}}`
 
-- Start a container from an image and get a shell inside of it:
+- Open a shell inside of an already running container:
 
-`docker container run -it {{image}} bash`
-
-- Run a command inside of an already running container:
-
-`docker container exec {{container_name}} {{command}}`
+`docker exec -it {{container_name}} {{sh}}`
 
 - Remove a stopped container:
 
-`docker container rm {{container_name}}`
+`docker rm {{container_name}}`
 
 - Fetch and follow the logs of a container:
 
-`docker container logs -f {{container_name}}`
+`docker logs -f {{container_name}}`