SSL in Cesium Terrain Server

We would like to host our own cesium-terrain-server (with custom heightmap terrain) in a Cesium application. The problem is that the whole page goes through HTTPS, so all insecure requests get blocked by the browser.

Currently, we use a workaround with Apache-based hosting, and it feels a bit clumsy because it has to recompress each tile before sending it.

Is it possible to enable SSL in the cesium-terrain-server application? The code seems rather simple but I am new to the Go language.

Despite the misleading name, cesium-terrain-server is not an official Cesium project and is not maintained by the Cesium development team. You might have better luck asking on their GitHub page.