Which command do I use to generate the build of a Vue app?

I think you've created your project like this:

vue init webpack myproject

Well, now you can run

npm run build

Copy index.html and /dist/ folder into your website root directory. Done.

If you've created your project using:

vue init webpack myproject

You'd need to set your NODE_ENV to production and run, because the project has web pack configured for both development and production:

NODE_ENV=production npm run build

Copy dist/ directory into your website root directory.

If you're deploying with Docker, you'd need an express server, serving the dist/ directory.

Dockerfile

FROM node:carbon

RUN mkdir -p /usr/src/app

WORKDIR /usr/src/app
ADD . /usr/src/app
RUN npm install

ENV NODE_ENV=production

RUN npm run build

# Remove unused directories
RUN rm -rf ./src
RUN rm -rf ./build

# Port to expose
EXPOSE 8080
CMD [ "npm", "start" ]