For running the app using docker you might have installed docker on your system. If you have not it Click Here. After it, you should run this commands to start the container:
#Create the image with node
docker build . -t crossfit-wod-api-node
#Starts the container with the API image
docker run -p 3000:3000 -d crossfit-wod-api-node
#After that the app runs on the port 3000. To check it:
docker ps #Copy the container id
docker logs <container-id>