docs(guides): add docker intro

docs/guides/plugin.rst

@@ -4,7 +4,7 @@ Create A New Plugin
 In this section we will walk you through how to create a new plugin from an existing Command Line Interface (CLI) tool. We will create a folder to save our
 plugin definition, write the plugin package metadata and define a few functions exposed by the plugin.
 
-We will be creating a plugin that uses EnergyPlus. This Plugin will transform commands provided in the `examples <https://github.com/NREL/EnergyPlus/blob/370d5b8f4d8a27a80d9b6ed21b1fa7a989f75dc1/doc/running-energyplus-from-command-line.md#examples>`_ 
+We will be creating a plugin that uses EnergyPlus. This Plugin will transform commands provided in the `examples <https://github.com/NREL/EnergyPlus/blob/370d5b8f4d8a27a80d9b6ed21b1fa7a989f75dc1/doc/running-energyplus-from-command-line.md#examples>`_
 section of the CLI documentation into Queenbee Plugin Functions.
 
 Getting Started
@@ -35,6 +35,9 @@ Configuration
 The ``config.yaml`` file contains information to indicate what underlying software should execute
 the plugin's functions. We will be focusing on the ``docker`` configuration.
 
+If you are unfamiliar with ``docker``, you can refer to the introduction
+here <https://www.docker.com/resources/what-container>.
+
 You can check the full schema definition for a plugin Config `here <../_static/redoc-plugin.html#tag/config_model>`_
 
 Docker Config
@@ -78,7 +81,7 @@ The file currently contains name and version information:
   name: energy-plus
   version: 0.1.0
 
-These are the two mandatory fields for this file. You can view a full list of other available 
+These are the two mandatory fields for this file. You can view a full list of other available
 fields `here <../_static/redoc-plugin.html#tag/metadata_model>`_.
 
 We will be adding a few more fields for demonstration purposes. Overwrite the contents of
@@ -91,10 +94,10 @@ We will be adding a few more fields for demonstration purposes. Overwrite the co
 Your First Function
 -------------------
 We are now finally ready to write a Function. Functions are the key ingredients of a plugin. A Function
-defines a parameterized command run in a terminal. You can refer to the 
+defines a parameterized command run in a terminal. You can refer to the
 `function schema definition  <../_static/redoc-plugin.html#tag/function_model>`_ to understand the components of a function.
 
-We listed some function we wanted to create based on examples provided by the EneryPlus documentation. 
+We listed some function we wanted to create based on examples provided by the EneryPlus documentation.
 
 We will start by creating a function that takes a weather file and an ``idf`` file as inputs, runs an energyplus simulation
 and outputs a folder with all the EnergyPlus output files. Delete the ``say-hi.yaml`` file in your ``functions`` folder.
@@ -133,7 +136,7 @@ directory. This is a packaged Plugin file which can be saved in a Queenbee
 Repository to share with others or be used in a Recipe.
 
 You should go to the `Repository Guide <repository.html>`_ section to understand
-how Plugins are packaged and shared. 
+how Plugins are packaged and shared.
 
 
 Using Plugins