wording and small fixes

.env.example

@@ -1,3 +1,3 @@
 # Copy this file to .env and set your host
-# Available hosts: wildfire, drought, 
-NIXOS_HOST=wildfire 
+# Available hosts: wildfire, hurricane, drought 
+NIXOS_HOST=wildfire 

rebuild-nix-system.sh

@@ -12,7 +12,7 @@ fi
 if [ -f ".env" ]; then
     source .env
 else
-    echo "Error: No .env file found. Copy example.env to .env and set your NIXOS_HOST"
+    echo "Error: No .env file found. Copy .env.example to .env and set your NIXOS_HOST"
     exit 1
 fi