refactor!: Change more const to default testnet srv

Author: dylanh724

crates/cli/src/config.rs

@@ -106,9 +106,9 @@ pub struct RawConfig {
     server_configs: Vec<ServerConfig>,
 }
 
-const DEFAULT_HOST: &str = "127.0.0.1:3000";
-const DEFAULT_PROTOCOL: &str = "http";
-const DEFAULT_HOST_NICKNAME: &str = "local";
+const DEFAULT_HOST: &str = "testnet.spacetimedb.com";
+const DEFAULT_PROTOCOL: &str = "https";
+const DEFAULT_HOST_NICKNAME: &str = "testnet";
 
 #[derive(Clone)]
 pub struct Config {