epaper is an example of how to display an image to a Waveshare 2.7 inch epaper display hat with the Raspberry Pi 3 B+ written in Golang.
Setup SPI by uncommenting dtparam=spi=on in /boot/config.txt. Then reboot sudo reboot.
Run an epaper example with Golang
go run -mod=vendor ./examples/imageRun epaper with Docker
docker build . -t dmowcomber/epaper
docker run --rm -v /dev/mem:/dev/mem --device /dev/gpiomem --device /dev/spidev0.0 dmowcomber/epaper
