Fix missing env var error

src/env.rs

@@ -41,7 +41,7 @@ pub fn load_config() -> anyhow::Result<EnvConfig> {
 }
 
 pub fn try_get_env(key: &str) -> anyhow::Result<String> {
-    let env = std::env::var(key)?;
+    let env = std::env::var(key).map_err(|e| anyhow::anyhow!(format!("{}: {}", key, e)))?;
 
     if env.trim().is_empty() {
         return Err(anyhow!(format!("env var {} is empty", key)));