doc: "docker getting started" mentions flash limitations (qmk#24336)

* doc: "docker getting started" mentions `flash` limitations Mass storage bootloader don't work with `flash` target. * Update docs/getting_started_docker.md Co-authored-by: James Young <[email protected]> --------- Co-authored-by: James Young <[email protected]>
salvi-1883208 · Sep 1, 2024 · 884a808 · 884a808
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commit 884a808
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diff --git a/docs/getting_started_docker.md b/docs/getting_started_docker.md
@@ -5,6 +5,7 @@ This project includes a Docker workflow that will allow you to build a new firmw
 ## Requirements
 
 The main prerequisite is a working `docker` or `podman` install.
+
 * [Docker CE](https://docs.docker.com/install/#supported-platforms)
 * [Podman](https://podman.io/getting-started/installation)
 
@@ -18,6 +19,7 @@ cd qmk_firmware
 ```
 
 Run the following command to build a keymap:
+
 ```
 util/docker_build.sh <keyboard>:<keymap>
 # For example: util/docker_build.sh planck/rev6:default
@@ -32,6 +34,8 @@ util/docker_build.sh keyboard:keymap:target
 # For example: util/docker_build.sh planck/rev6:default:flash
 ```
 
+Note that mass storage bootloaders are not supported by the `flash` target. In this case you will have to manually copy the firmware file to the keyboard.
+
 You can also start the script without any parameters, in which case it will ask you to input the build parameters one by one, which you may find easier to use:
 
 ```