Add note about Docker and Podman compatibility in README

Author: teresaromero

README.md

@@ -39,6 +39,8 @@ Run the `help` command and see available commands:
 elastic-package help
 ```
 
+Some sub-commands are Docker-based, check you also have Docker installed. In case you are using Podman, check [this guide](./docs/howto/use_podman.md) to make it compatible.
+
 ## Development
 
 Even though the project is "go-gettable", there is the [`Makefile`](./Makefile) present, which can be used to build,

tools/readme/readme.md.tmpl

@@ -39,6 +39,8 @@ Run the `help` command and see available commands:
 elastic-package help
 ```
 
+Some sub-commands are Docker-based, check you also have Docker installed. In case you are using Podman, check [this guide](./docs/howto/use_podman.md) to make it compatible.
+
 ## Development
 
 Even though the project is "go-gettable", there is the [`Makefile`](./Makefile) present, which can be used to build,