Add timestamp to snippet uuid hash

src/snippet.rs

-use chrono::NaiveDateTime;
+use chrono::{Local, NaiveDateTime};
 use crypto::digest::Digest;
 use crypto::sha2::Sha256;
 use diesel::pg::PgConnection as PGC;
 }
 
 fn generate_uuid(snippet: &ApiSnippet) -> String {
+    let current_timestamp = Local::now().to_string();
     let mut hasher = Sha256::new();
-    hasher.input_str(&format!("{}{}", snippet.title, snippet.body));
+    hasher.input_str(&format!(
+        "{}{}{}",
+        snippet.title, snippet.body, current_timestamp
+    ));
     hasher.result_str().to_string()
 }