Initialize project with basic backend setup

src/config.rs

@@ -0,0 +1,36 @@
+// src/config.rs
+
+use std::env;
+use std::net::SocketAddr;
+use std::str::FromStr;
+
+use tracing::error;
+
+#[derive(Debug)]
+pub struct Config {
+    pub bind_address: SocketAddr,
+    pub database_url: Option<String>,
+}
+
+impl Config {
+    pub fn from_env() -> Result<Self, String> {
+        let bind_address_str =
+            env::var("BIND_ADDRESS").unwrap_or_else(|_| "127.0.0.1:3000".to_string());
+
+        let bind_address = SocketAddr::from_str(&bind_address_str)
+            .map_err(|e| format!("Invalid BIND_ADDRESS: {}", e))?;
+
+        #[cfg(feature = "no-auth")]
+        if bind_address.ip() != std::net::IpAddr::from([127, 0, 0, 1]) {
+            error!("In no-auth mode, BIND_ADDRESS must be 127.0.0.1");
+            return Err("In no-auth mode, BIND_ADDRESS must be 127.0.0.1".to_string());
+        }
+
+        let database_url = env::var("DATABASE_URL").ok();
+
+        Ok(Self {
+            bind_address,
+            database_url,
+        })
+    }
+}