Improve install instructions

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@gmail.com>

Author: kaustavdm

README.md

@@ -9,10 +9,13 @@ The `develop` branch contains a full example, where the bot waits till someone r
 
 ## Install
 
-- Use the latest Node.js LTS (v14.15.0 as of this writing).
+- **Install Node**: Use the latest Node.js LTS (v14.15.0 as of this writing).
     - Make sure you have `npm` or `yarn` on the PATH.
-- Install depencendies: In the root directory, run `$ npm install` 
-- Run the script using: From the same directory, run `$ node index.js`
+- **Install depencendies**: In the root directory, run `$ npm install`
+- **Add credentials**: Copy `credentials.sh` to `local.credentials.sh`, and add Matrix credentials in the new file
+    - `local.credentials.sh` is added to `.gitignore`, so you don't have to worry about leaking your secrets
+    - Source the file: `source local.credentials.sh`
+- **Run**: From the same directory, run `$ node index.js`
 
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