Added docker building.

src/bot/handlers/fun/greeter.rs

@@ -4,6 +4,17 @@ use rand::seq::IteratorRandom;
 
 use crate::bot::handlers::base::Handler;
 
+lazy_static::lazy_static! {
+    static ref GREETINGS: &'static [&'static str] = &[
+        "Привет!",
+        "Добрый день!",
+        "Здравствуйте.",
+        "Приетствую.",
+        "Доброго времени суток.",
+    ];
+}
+
+/// Greeter just replies to greeting messages.
 #[derive(Clone)]
 pub struct Greeter;
 
@@ -18,9 +29,8 @@ impl Handler for Greeter {
             return Ok(());
         }
 
-        let reply_text = ["Привет!", "Добрый день!", "Здравствуйте.", "Приетствую"]
-            .into_iter()
-            .choose(&mut rand::thread_rng());
+        // Choose random greeting from the list of greetings.
+        let reply_text = GREETINGS.iter().choose(&mut rand::thread_rng()).copied();
 
         if let Some(text) = reply_text {
             message.reply(text).await?;