Added database connection

Code now connects to database and prints out errors. Also the ticket
table now includes a timestamp field

backend/src/main.rs

@@ -1,10 +1,24 @@
+mod models;
 use axum::{Router, routing};
 use dotenv::dotenv;
+use models::*;
 use serde::{Deserialize, Serialize};
 use sqlx::{PgPool, postgres::PgPoolOptions};
 
 #[tokio::main]
 async fn main() {
+    dotenv().ok();
+    let database_url = std::env::var("DATABASE_URL").expect("DATABASE_URL variable not set");
+    let pool = match PgPoolOptions::new().connect(&database_url).await {
+        Ok(pool) => {
+            println!("Database connection successful");
+            pool
+        }
+        Err(err) => {
+            println!("Failed to connect to database: {:?}", err);
+            std::process::exit(1);
+        }
+    };
     let app = Router::new().route("/", routing::get(root_handler));
 
     let listener = tokio::net::TcpListener::bind("0.0.0.0:8001").await.unwrap();