# Build a Markdown Previewer **Demo:** [markdown-previewer.radii.page](https://markdown-previewer.radii.page/) **Profile:** [https://www.freecodecamp.org/radii](https://www.freecodecamp.org/radii) **Project specification:** [Build a Markdown Previewer](https://www.freecodecamp.org/learn/front-end-development-libraries/front-end-development-libraries-projects/build-a-markdown-previewer) **[Tests](https://cdn.freecodecamp.org/testable-projects-fcc/v1/bundle.js)** ## Build and deploy as: ```{bash} cd markdown-previewer npm install npm run build cd .. DOCKER_BUILDKIT=1 docker build -t radii/markdown-previewer:latest -f ./dockerfile ./markdown-previewer/build docker run -p 8081:80 -it radii/markdown-previewer ``` Access WebApp at [http://localhost:8081](http://localhost:8081) Note: you may replace `8081` with any other port number where you wish to make service available. ## Run tests as: After building, go to to `public` sub-directory and edit `index.html` file and insert bellow code snippet immediately before closing `` tag: ```{html} ``` Than start development instance as: ```{bash} npm start ``` You should now see a hamburger on top-left of page. Tap/click it than select test suite `Markdown Previewer`. `Run Tests` and observe results.