Every dockware version (except play) allows you to switch to a different Node version by using the installed "nvm" Node Version Manager. We currently support Node v12, v14 and v16.
This is done when starting your container.
You can either use a command option when using "docker run", or set the Node version in your docker-compose.yml file.\
docker run --rm -p 80:80 -e NODE_VERSION=14 dockware/flex:latest
shopware:
image: dockware/flex:latest
...
environment:
- NODE_VERSION=14
nvm use 14
nvm use 16