Add .env to ignore and remove warning.

.dockerignore

 assets
-target
\ No newline at end of file
+target
+.env
\ No newline at end of file

src/util/variables.rs

-use log::warn;
 use std::env;
 
+#[cfg(debug_assertions)]
+use log::warn;
+
 lazy_static! {
     // General Configuration
     pub static ref MONGO_URI: String =