fix: correct the execution of commands and re-organize code

examples/docker_compose.rs

@@ -1,9 +1,9 @@
-//! Docker Compose example demonstrating multi-container application management
+//! Docker Compose example demonstrating multi-container application management.
 //!
 //! This example shows how to use the compose feature to manage
 //! multi-container applications with Docker Compose.
 //!
-//! Run with: cargo run --example docker_compose --features compose
+//! Run with: cargo run --example docker_compose --features compose.
 
 #[cfg(feature = "compose")]
 use docker_wrapper::compose::down::RemoveImages;

examples/exec_examples.rs

@@ -175,7 +175,7 @@ async fn env_exec_example(container_id: &str) {
         }
     }
 
-    // Multiple environment variables from HashMap
+    // multiple environment variables from HashMap
     let mut env_vars = HashMap::new();
     env_vars.insert("DEBUG".to_string(), "true".to_string());
     env_vars.insert("LOG_LEVEL".to_string(), "info".to_string());