Add three-node devnet-local configuration

[HCastano]

This adds a third node to our devnet-local chainspec and adds that to our Docker
Compose setup.

While the containers spin up correctly, I've ran into some issues around TSS accounts not
being funded properly and with signing not working on the test CLI. Since these issues
aren't exactly related to the Docker stuff I'm gonna dig into those in some different
PRs.

Closes #892.

[vitropy]

I appreciate the atomicity of this PR! I think I caught a few minor port mismatches but otherwise it looks okay to my eyes.

[ameba23]

@HCastano

re: having issues with signing messages with this setup using the test-cli - just to confirm i was able to successfully register and sign using the test-cli. I just needed to add the line:

127.0.0.1 charlie-tss-server

to /etc/hosts - which probably needs adding to the readme.

So this is great!

Although that doesn't explain why you had issues with accounts not being funded. (i tried with Alice and that worked)

[HCastano]

@ameba23 I could've sworn I added that to the README guess it didn't make it into the PR 😅

I suspect my original problem stemmed from using the wrong port of Charlie in the config. For the record, here's the error I was running into during signing:

entropy-core on  hc/three-node-docker [!] via 🐳 desktop-linux via 🦀 v1.76.0 took 49s
❮ cargo run -p entropy-test-cli -- sign 0275e3086dce2392af6f4b9c9895d577d0fe1e7e7d425fa3fff6bd89c6f28d00f5 "Hello, Docker Compose"
    Finished dev [unoptimized + debuginfo] target(s) in 0.95s
     Running `target/debug/entropy-test-cli sign 0275e3086dce2392af6f4b9c9895d577d0fe1e7e7d425fa3fff6bd89c6f28d00f5 'Hello, Docker Compose'`
User account for current call: 5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY
Failed!
Error: Signing failed: Encryption or signing error: Hpke: HPKE Error: OpenError

As for the the accounts not being funded, are you not getting any warnings about that in the TSS logs at startup?