feat: Add .env file to gitignore and update dependencies

The commit adds the `.env` file to the `.gitignore` and updates the dependencies in the `Cargo.toml` and `Cargo.lock` files. This change ensures that sensitive environment variables are not committed to the repository and keeps the dependencies up to date.

migration/src/main.rs

@@ -1,6 +1,8 @@
 use sea_orm_migration::prelude::*;
+use dotenv::dotenv;
 
 #[async_std::main]
 async fn main() {
+    dotenv().ok(); 
     cli::run_cli(migration::Migrator).await;
 }