integrate docker and implement state tracking for server lifecycle management

src/config.rs

@@ -1,5 +1,5 @@
-use std::error::Error;
 use std::fs;
+use anyhow::Result;
 use serde::Deserialize;
 
 #[derive(Debug, Deserialize, Clone)]
@@ -11,10 +11,26 @@ pub struct Config {
     pub rcon_password: String,
     pub idle_timeout_secs: u64,
     pub polling_interval_millis: u64,
+
+    pub container_name: String,
+
+    #[serde(default = "default_startup_timeout_secs")]
+    pub startup_timeout_secs: u64,
+
+    #[serde(default = "default_rcon_retry_interval_secs")]
+    pub rcon_retry_interval_secs: u64,
+}
+
+fn default_startup_timeout_secs() -> u64 {
+    600
+}
+
+fn default_rcon_retry_interval_secs() -> u64 {
+    1
 }
 
 impl Config {
-    pub fn load(path: &str) -> Result<Self, Box<dyn Error>> {
+    pub fn load(path: &str) -> Result<Self> {
         let content = fs::read_to_string(path)?;
         let config: Config = toml::from_str(&content)?;
         Ok(config)