Add Python version support information to docs (#620)

* Add version support pre-requisites to documentation

Author: antesaj

docs/server-install.md

@@ -15,6 +15,16 @@ These instructions explain how to install and start up TabPy Server.
 
 ## TabPy Installation
 
+### Prerequisites
+
+- TabPy only supports Python versions 3.7, 3.8, and 3.9
+- TabPy 2.7.0 added support for data streaming via
+Apache Arrow Flight (`pyarrow`). When using TabPy >= 2.7.0, we
+recommend using a Python 64-bit installer to avoid incompatibility issues
+related to `pyarrow`.
+
+### Installation
+
 To install TabPy on to an environment `pip` needs to be installed and
 updated first:
 
@@ -30,7 +40,7 @@ pip install tabpy
 
 ## Starting TabPy
 
-To start TabPy with default setting run the following command:
+To start TabPy with default settings run the following command:
 
 ```sh
 tabpy