prod and dev configuration with webpack plugin instead of executor

[timonmasberg]

Hi!
As we need to move away from isolated webpack configs, I am currently migrating my build step away from it ( https://nx.dev/recipes/webpack/webpack-config-setup). Currently, we have a production configuration in our project.json for optimization etc... now I use the NODE_ENV directly in the webpack config as proposed in the docs, but when I run with development target, it is also "production", is there something I am missing?