Remove paths including the domain name

[kkaris]

Currently there are places where the domain name is explicitly set, this should be changed if possible to only use only the path (instead of domain + path) so when e.g., deploying the app using an ELB it's possible to reach the backend.

Change these places:

• About.vue
• AxiosMethods.js. The usage of Axios here should be replaced by the nowadays browser native fetch.