It supports various file formats, including text, text/vtt, vtt, and jpg (JPEG image). It is written in Go and does not use any external libraries.

What is Docker? Docker is a program used to run applications on the Linux-based Linux containers, using a simple, self-contained, self-contained image format called Dockerfile. The image format provides two main differences from the existing container format, the first being the format of the image (as opposed to the traditional, binary format of a Linux kernel). The second is that containers are created by having the Dockerfile as the initial base. Applications can then be downloaded and executed using the Docker daemon, without requiring the need for a full Linux-based system. In addition, users can create their own images, adding additional functionality such as network security, virtualization, and multi-host infrastructure.