Implement hot reloading for golang backend

[dkumiszhan]

Currently, hot reloading is only available for svelte frontend. Ideally we can run golang backend with svelte frontend reloading both. To support that we need the following:

• google authentication not working on localhost:8080
• live reload go backend with air or something similar
• make svelte frontend fetch data from golang backend on different ports. I partially implemented that in https://github.com/honeynet/ochi/pull/77.