Add Docker mode notes (#890)

docs/configs/clearml_conf.md

@@ -140,7 +140,7 @@ the same argument is passed in both. If set to `False`, a task's docker argument
 Compatible with Docker versions 0.6.5 and above
 :::
 
-* Set a name format for Docker containers created by an agent
+* Set a name format for Docker containers created by an agent running in [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode)
 
 * The following variables can be used:
   * `task_id`
@@ -206,7 +206,7 @@ For example:
 
 **`agent.docker_use_activated_venv`** (*bool*)
 
-* In Docker mode, if the container's entrypoint automatically activates a virtual environment, the activated virtual 
+* In [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode), if the container's entrypoint automatically activates a virtual environment, the activated virtual 
 environment is used and everything is installed in it. Set to `false` to disable, and always create a new venv inheriting 
 from `system_site_packages`
 
@@ -232,13 +232,14 @@ from `system_site_packages`
 
 **`agent.extra_docker_arguments`** (*[string]*)
         
-* Optional arguments to pass to the Docker image. These are local for this agent, and will not be updated in the experiment's `docker_cmd` section. For example, `["--ipc=host", ]`.
+* Optional arguments to pass to the Docker image when ClearML Agent is running in [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode). These are local for this agent, and will not be updated in the experiment's `docker_cmd` section. For example, `["--ipc=host", ]`.
         
 ---
         
 **`agent.extra_docker_shell_script`** (*[string]*)
         
-* An optional shell script to run in the Docker, when the Docker starts, before the experiment starts. For example, `["apt-get install -y bindfs", ]`
+* When ClearML Agent is running in [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode), this 
+optional shell script executes inside the Docker on startup, before the experiment starts. For example, `["apt-get install -y bindfs", ]`.
         
 ---
 
@@ -397,19 +398,19 @@ ___
 
 **`agent.default_docker`** (*dict*)
         
-* Dictionary containing the default options for workers in Docker mode.
+* Dictionary containing the default options for workers in [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode).
         
 ---
         
 **`agent.default_docker.arguments`** (*string*)
         
-* If running a worker in Docker mode, this option specifies the options to pass to the Docker container.
+* If running a worker in [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode), this option specifies the options to pass to the Docker container.
         
 ---
         
 **`agent.default_docker.image`** (*string*)
         
-* If running a worker in Docker mode, this option specifies the default Docker image to use.
+* If running a worker in [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode), this option specifies the default Docker image to use.
         
 ---
 
@@ -419,7 +420,8 @@ ___
 This feature is available under the ClearML Enterprise plan
 :::
 
-* Lookup table of rules for default container. The first matched rule will be picked, according to rule order. 
+* Lookup table of rules for default container if running a worker in [Docker mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode). 
+The first matched rule will be picked, according to rule order. 
   
 * Each dictionary in the list lays out rules, and the container to be used if the rules are matched. The
 rules can be script requirements, Git details, and/or Python binary, and/or the task's project. 

docs/webapp/webapp_exp_table.md

@@ -72,6 +72,17 @@ To create an experiment through the UI interface:
      * Image - Docker image to use for running the experiment
      * Arguments - Add Docker arguments as a single string
      * Startup Script - Add a bash script to be executed inside the Docker before setting up the experiment's environment 
+       
+       :::important 
+       For a task to run in the specified container, the ClearML Agent executing the task must be running in 
+       Docker mode:
+
+       ```bash
+       clearml-agent daemon --queue <execution_queue_to_pull_from> --docker
+       ```
+       For more information, see [Docker Mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode).
+       :::
+     
    * **Run**
      * Queue - [ClearML Queue](../fundamentals/agents_and_queues.md#what-is-a-queue) where the experiment should be 
      enqueued for execution

docs/webapp/webapp_exp_track_visual.md

@@ -92,6 +92,16 @@ The Container section list the following information:
 * Arguments - add Docker arguments
 * Setup shell script - a bash script to be executed inside the Docker before setting up the experiment's environment
 
+:::important 
+To [rerun](webapp_exp_tuning.md) an experiment through the UI in the listed container, the ClearML Agent executing the experiment must be running in 
+Docker mode:
+
+```bash
+clearml-agent daemon --queue <execution_queue_to_pull_from> --docker [optional default docker image to use]
+```
+
+For more information, see [Docker Mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode).
+:::
 
 ![Container section](../img/webapp_exp_container.png)
 

docs/webapp/webapp_exp_tuning.md

@@ -77,7 +77,16 @@ Select a pre-configured Docker that **ClearML Agent** will use to remotely execu
 * In **EXECUTION** **>** **AGENT CONFIGURATION** **>** **BASE DOCKER IMAGE** **>** hover **>** **EDIT** **>**
   Enter the base Docker image.
 
+:::important 
+For a ClearML Agent to execute the task in a container, the agent must be running in 
+Docker mode:
 
+```bash
+clearml-agent daemon --queue <execution_queue_to_pull_from> --docker [optional default docker image to use]
+```
+
+For more information, see [Docker Mode](../clearml_agent/clearml_agent_execution_env.md#docker-mode).
+:::
 
 #### Output Destination