explain temperature setting in env file (#4140)

Co-authored-by: Richard Beales <rich@richbeales.net>

.env.template

@@ -41,7 +41,17 @@
 
 ### OPENAI
 ## OPENAI_API_KEY - OpenAI API Key (Example: my-openai-api-key)
+
+
+## NOTE: https://platform.openai.com/docs/api-reference/completions
+# The temperature setting in language models like GPT controls the balance between predictable and random responses. 
+# Lower temperature makes the responses more focused and deterministic, while higher temperature makes them more 
+# creative and varied. The temperature range typically goes from 0 to 2 in OpenAI's implementation.
+##
 ## TEMPERATURE - Sets temperature in OpenAI (Default: 0)
+##
+###
+
 ## USE_AZURE - Use Azure OpenAI or not (Default: False)
 OPENAI_API_KEY=your-openai-api-key
 # TEMPERATURE=0