Run speedtest-cli within docker and append to Google Sheet through IFTTT

1. Install dependencies:
   • Docker
   • tianon/speedtest: docker pull tianon/speedtest
2. Configure IFTTT:
   • Example Webhook Applet: https://ifttt.com/applets/379108p-log-speedtest-results-to-spreadsheet
   • Retrieve IFTTT Secret: https://ifttt.com/services/maker_webhooks/settings (i.e. https://url/use/<secret>)
   • Configure secret in script secret_key="<secret-key>"
3. Run speed test & verify results:
   • ./speedtest-ifttt.sh
   • Add columns to newly created google sheet: Sheet columns: "Date,Ping,Download (Mbps),Upload (Mbps)"
4. Configure to run periodically with crontab:
   • For example, every 4 hours: 0 */4 * * * /path/to/speedtest-ifttt.sh