If you used nginx-proxy you can run as
docker run -d --name sharex --restart always \
-e 'VIRTUAL_HOST=share.example.com' -e 'VIRTUAL_PORT=3000' \
-v /home/docker/sharex/images:/app/files \
visteras/sharex-uploader:latest
If not
docker run -d --name sharex --restart always \
-e 'VIRTUAL_HOST=share.example.com' \
-p 80:3000 \
-v /home/docker/sharex/images:/app/files \
visteras/sharex-uploader:latest