Dynamic url Vuejs + NuxtJS?

Question

Vue.js

You need to create a dynamic url on vuejs.
The problem is that it works on dev, but after the build it says that the page was not found.

axios.get('http://jsonplaceholder.typicode.com/posts/' + this.$route.params.post)
    .then(response => {
        this.post = response.data;
    })
    .catch(e => {
      this.errors.push(e)
    });

Folder structure:

the output should be example.com/news/1, example.com/news/2
where 1,2 is the post number