Documentation Revamp

Co-authored-by: jbdoumenjou <jb.doumenjou@gmail.com>

docs/content/operations/cli.md

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+# CLI
+
+The Traefik Command Line
+{: .subtitle }
+
+## General
+
+```bash
+traefik [command] [--flag=flag_argument]
+```
+
+Available commands: 
+
+- `version` : Print version
+- `storeconfig` : Store the static Traefik configuration into a Key-value stores. Please refer to the `Store Traefik configuration`(TODO: add doc and link) section to get documentation on it.
+- `bug`: The easiest way to submit a pre-filled issue.
+- `healthcheck`: Calls Traefik `/ping` to check health.
+
+Each command can have additional flags.
+
+All those flags will be displayed with:
+
+```bash
+traefik [command] --help
+```
+
+Each command is described at the beginning of the help section:
+
+```bash
+traefik --help
+
+# or
+
+docker run traefik[:version] --help
+# ex: docker run traefik:1.5 --help
+```
+
+## Command: bug
+
+The easiest way to submit a pre-filled issue on [Traefik GitHub](https://github.com/containous/traefik)! Watch [this demo](https://www.youtube.com/watch?v=Lyz62L8m93I) for more information.
+
+```bash
+traefik bug
+```
+
+### Command: healthcheck
+
+Checks the health of Traefik.
+Its exit status is `0` if Traefik is healthy and `1` if it is unhealthy.
+
+This can be used with Docker [HEALTHCHECK](https://docs.docker.com/engine/reference/builder/#healthcheck) instruction or any other health check orchestration mechanism.
+
+!!! note
+    The [`ping` endpoint](../ping/) must be enabled to allow the `healthcheck` command to call `/ping`.
+
+```bash
+traefik healthcheck
+```
+
+```bash
+OK: http://:8082/ping
+```