README and panic on no versions

README.md

@@ -0,0 +1,4 @@
+# Cwtch Update Bot
+
+- Creates a persistent profile in ~/.cwtch/bots/update_bot
+- Servers the latest version of cwtch from the directory `cwtch_dist`

src/main.rs

@@ -41,6 +41,9 @@ impl UpdateBot {
                 versions_dirs.push(path);
             }
         }
+        if versions_dirs.len() == 0 {
+            panic!("no cwtch versions detected in {}!", DIST_DIR)
+        }
         versions_dirs.sort();
         println!("sorted vd: {:?}", versions_dirs);
         let latest_version = versions_dirs[versions_dirs.len() - 1].clone();