As a CA(Certificate Authority), Let's Encrypt provides free and automatic TLS/SSL certificates, which enables encrypted HTTPS for SRS Droplet. It's very easy to use, only by 1-Click.
HTTPS is required for publishing streams using WebRTC, and it improves security. If you want to support the video streaming in any HTTPS website, such as a WordPress website, you must use HLS/FLV/WebRTC with HTTPS, or it will fail for security reasons.
Note that SRS droplet only supports a single domain name, which makes the problem simple. It is easy to use.
In this tutorial, you will learn how to configure the HTTPS for SRS droplets, and your certificate will be renewed automatically.