Added better docs for Syringe environment variables
Configuring Syringe
================================
-Syringe is configured with environment variables. Here is a list.
+Syringe is configured through environment variables. Since Syringe is typically deployed on Kubernetes, the best
+way to pass these to Syringe is directly in the ``Pod`` or ``Deployment`` definition:
-TBD
+.. code:: yaml
+
+ (...truncated...)
+
+ containers:
+ - name: syringe
+ image: antidotelabs/syringe:latest
+ imagePullPolicy: Always
+ env:
+ - name: SYRINGE_LESSONS
+ value: "/antidote/lessons"
+ - name: SYRINGE_DOMAIN
+ value: "localhost"
+
+ (...truncated...)
+
+If you're using `antidote-selfmedicate <https://github.com/nre-learning/antidote-selfmedicate>`_ to spin up an instance of Antidote and Syringe yourself, note that these are provided
+in the included `Kubernetes manifest <https://github.com/nre-learning/antidote-selfmedicate/blob/master/syringe.yml>`_.
+
+
+
+See the table below for a description of each, as well as information on which are required, and which have default values.
+
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| Variable Name | Required? | Default Value | Description |
++===============================+===========+==============================================+==================================================================================================================+
+| SYRINGE_LESSONS | Yes | N/A | Directory where the lessons are stored |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| SYRINGE_DOMAIN | Yes | N/A | Domain where Antidote-web is running. Used to control ingress routing |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| SYRINGE_GRPC_PORT | No | 50099 | Port to use for Syringe's GRPC service |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| SYRINGE_HTTP_PORT | No | 8086 | Port to use for the grpc-gateway REST API for Syringe |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| SYRINGE_TIER | No | local | Controls which lessons Syringe makes available based on lesson metadata. Can be ``local``, ``ptr``, or ``prod``. |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| SYRINGE_LESSON_REPO_REMOTE | No | https://github.com/nre-learning/antidote.git | Git repo from which to clone lessons into lesson endpoint pods |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| SYRINGE_LESSON_REPO_BRANCH | No | master | Git branch to use in lesson endpoint pods |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
+| SYRINGE_LESSON_REPO_DIR | No | /antidote | Destination directory to use when cloning into lesson endpoint pods |
++-------------------------------+-----------+----------------------------------------------+------------------------------------------------------------------------------------------------------------------+
