Update README.md

README.md

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+
 # kno-logic-api
 <p align="center">
   <img src="https://imgur.com/P2nDq7b.png" width="180">
@@ -5,10 +6,10 @@
 
 Kno-logic is a mobile learning platform with a short number of curated articles added daily for lifelong learners. This API was built with NodeJS and Express, and uses MongoDB as a database.
 
-## Developing locally
+## Running Application
 If you would like to run the application you will need:
  - NodeJS 14
- - MongoDB Community
+ - MongoDB Community Server
 
 Install the latest version of [`Node.js`](https://nodejs.org/en/). 
 
@@ -28,3 +29,29 @@ nodemon
 # running the server
 node .
 ```
+## Email Templates
+Emails are stored in the [`templates`](https://github.com/jslightham/kno-logic-api/tree/main/templates) directory. Any text files in the [`templates`](https://github.com/jslightham/kno-logic-api/tree/main/templates) directory will be added to the MongoDB message collection. 
+
+Any portion of the message can be replaced when sending the email. The convention used in all default email templates  is `%replace_string%`. The replace string does not matter since when calling the sendMail function, replacements is an array of data with the form `{from: "%replace_string%", to: "Username"}`. 
+
+## Configuration
+Configuration for the application is done in the [`config.js`](https://github.com/jslightham/kno-logic-api/blob/main/config.js) file. 
+
+Example configuration:
+```
+var config = {};
+
+// Mailer settings
+config.mail = {};
+config.mail.host = "localhost";
+config.mail.port = "465";
+config.mail.secure = false;
+config.mail.user = "username";
+config.mail.pass = "pass";
+config.mail.from = "<noreply@knologic.com>"
+
+// Session purge settings
+config.maxSessionLength = 30;
+
+module.exports = config;
+```