Installation: Low cost installation

[elliotxx]

What would you like to be added?

Karpor currently only support ElasticSearch, but the installation cost of ElasticSearch is relatively high and we need to consider a low-cost installation method, sush as support ZincSearch, SQLLite etc (#230 ).

If we completely replace etcd and es with sqlite (which should be technically feasible), we can even use a binary to launch karpor independently, independent of kubernetes and docker, or even install it with one click using package management tools such as homebrew, scoop, go install. This is so cool.

Why is this needed?

No response

[solarhell]

I check the code and didn't find etcd is used for what.

[elliotxx]

@solarhell karpor-server is essentially a kubernetes apiserver, so it needs etcd as storage behind it.