feat: add PostgreSQL connection form

src/db.rs

@@ -48,7 +48,10 @@ pub struct Page {
 
 impl Database {
     pub fn connect(connection: &str) -> Result<Self> {
-        let mut config: Config = connection.parse()?;
+        Self::connect_postgres(connection.parse()?)
+    }
+
+    pub fn connect_postgres(mut config: Config) -> Result<Self> {
         if config.get_connect_timeout().is_none() {
             config.connect_timeout(Duration::from_secs(5));
         }