docs: environment variables supported by v0.33

docs/environment-variables.md

@@ -0,0 +1,44 @@
+---
+title: Environment Variables
+layout: docs
+---
+
+Tableau Server Client (TSC) can use environment variables to pull configuration
+settings. This is a convenient way to manage the setting in one place and have
+it used across all of the related calls.
+
+## Supported environment variables
+
+The following environment variables are supported by TSC:
+
+Name | Description | Version | Default | Limit
+:--- | :--- | :--- | :--- | :---
+`TSC_CHUNK_SIZE_MB` | The size of chunks when uploading files. Limit is 64 MB. | 0.33 | 50 | 64
+`TSC_PAGE_SIZE` | The number of items to return in a single page of results. | 0.33 | 100 | 1000
+
+## Setting environment variables
+
+To set an environment variable, you can use the `os` module in Python. Here is 
+an example of setting the environment variables for the chunk size and page size:
+
+```py
+import os
+
+import tableauserverclient as TSC
+
+os.environ['TSC_CHUNK_SIZE_MB'] = '64'
+os.environ['TSC_PAGE_SIZE'] = '1000'
+
+# Continue with your TSC code
+```
+
+You can set these environment variables in your Python script, shell, IDE, bash
+or PowerShell profile, CI/CD pipeline, .env file, or any other place where you
+can set environment variables.
+
+## Using environment variables
+
+The TSC library will automatically pick up the environment variables when they
+are set. If you set the environment variables in your Python script, they will
+be used for the duration of the script. If you set them in your shell or IDE,
+they will be used for all scripts that run in that environment.