First, run the development server:
npm run dev
# or
yarn dev
Open http://localhost:3000 with your browser to see the result.
If you are using Visual Studio Code install the [https://marketplace.visualstudio.com/items?itemName=ms-azuretools.vscode-docker](Docker plugin).
After installation right click your dockerfile and select "Build image..." Name your image and enjoy.
The tag is really up to you, heres an example:
docker build --tag dashboarddev-latest:1.0 .