[Config] Update the 'Starting and stopping instances' guide to using a new config

[andreyaksenov]

Related docs. issue(s): #3847

Product: Tarantool
Since: 3.0
Root document: https://www.tarantool.io/en/doc/latest/book/admin/start_stop_instance/
SME: @ Totktonada

Example

tt configuration structure:

└── instances.enabled
    └── app
        ├── config.yaml
        └── instances.yml

config.yaml:

credentials:
  users:
    replicator:
      password: 'topsecret'
      roles: [replication]
    client:
      password: 'secret'
      roles: [super]

iproto:
  advertise:
    peer: replicator@

replication:
  failover: election

groups:
  group-001:
    replicasets:
      replicaset-001:
        instances:
          instance-001:
            iproto:
              listen: 127.0.0.1:3301
          instance-002:
            iproto:
              listen: 127.0.0.1:3302
          instance-003:
            iproto:
              listen: 127.0.0.1:3303

instances.yaml:

app.instance-001:

app.instance-002:

app.instance-003:

Run app:

tt start app

[andreyaksenov]

https://docs.d.tarantool.io/en/doc/3.0/book/admin/start_stop_instance/