feat: load puppeteer faster, run stores in parallel (#83)

Co-authored-by: Jef LeCompte <jeffreylec@gmail.com>

.env-example

@@ -16,3 +16,5 @@ STORES="bestbuy,bandh,nvidia"
 SCREENSHOT="true"
 TELEGRAM_ACCESS_TOKEN=""
 TELEGRAM_CHAT_ID="1234"
+HEADLESS="true"
+LOG_LEVEL="info"

README.md

@@ -64,6 +64,8 @@ Here is a list of variables that you can use to customize your newly copied `.en
 |:---:|---|---|
 | `EMAIL_USERNAME` | Gmail address | E.g.: `jensen.robbed.us@gmail.com` |
 | `EMAIL_PASSWORD` | Gmail password | See below if you have MFA | 
+| `HEADLESS` | Puppeteer to run headless or not (Debugging Purposes) |
+| `LOG_LEVEL` | [Logging levels](https://github.com/winstonjs/winston#logging-levels)  (Debugging Purposes) |
 | `NOTIFICATION_TEST` | Test all the notifications configured | Default: `false` |
 | `OPEN_BROWSER` | Toggle for whether or not the browser should open when item is found | Default: `true` |
 | `PAGE_TIMEOUT` | Navigation Timeout in milliseconds | `0` for infinite, default: `30000` |
@@ -80,7 +82,6 @@ Here is a list of variables that you can use to customize your newly copied `.en
 | `SCREENSHOT` | Capture screenshot of page if a card is found | Default: `true` |
 | `TELEGRAM_ACCESS_TOKEN` | Telegram access token |
 | `TELEGRAM_CHAT_ID` | Telegram chat ID |
-
 > :point_right: If you have multi-factor authentication (MFA), you will need to create an [app password](https://myaccount.google.com/apppasswords) and use this instead of your Gmail password.
 
 #### Supported stores