Resource Requirements + Flexible Setup

[TheGreatAxios]

Is your feature request related to a problem? Please describe.
This is not a direct problem, but some tweaks can make it far more flexible to setup. This has been discussed in #36 but should also be very easy for single chain.

Describe the solution you'd like
The proxy should default to "ALL" chains, however, it should be a configuration/environment variable that enables the proxy to run for a smaller subset of chains, or even a single chain. Projects of any size could then move proxies closer to their users in a much simpler manner.

Minimum Resource Requirement Re-evaluation - See Below

Describe alternatives you've considered
N/A

Additional context

• This can be done currently by tweaking the hotfix in /proxy/endpoints.py to be != as opposed to == - Can Confirm this works
• The minimum proxy resources could based on a flat amount (for core docker/resources) and then be set on a per-chain basis.
  Example X + NY where X = Base Resources of 1 vcpu and 1 gb memory and then Y requires 0.25 vcpu and 0.25gb memory and N is number of chains being setup on a given proxy
• Internal Proxy usage for projects or smaller dApps should be able to leverage the smallest compute resource possible to attain a self-hosted proxy while larger projects and multi-SKALE Chain projects would require more resources.