Allow changing service config in railway environment new

Cargo.toml

@@ -98,11 +98,13 @@ tokio-util = "0.7.15"
 similar = "2.7.0"
 pathdiff = "0.2.3"
 pastey = "0.1.1"
+derive_more = { version = "2.1.1", features = ["display"] }
 nix = { version = "0.30.1", features = ["signal"] }
 fs2 = "0.4.3"
 async-trait = "0.1.89"
 ratatui = "0.29"
 scopeguard = "1.2"
+schemars = "0.8"
 
 [profile.release]
 lto = "fat"

src/commands/add.rs

@@ -256,7 +256,7 @@ fn prompt_variables(variables: Vec<Variable>) -> Result<Option<BTreeMap<String,
     }
     if variables.is_empty() {
         return Ok(Some(
-            prompt::prompt_variables()?
+            prompt::prompt_variables(None)?
                 .into_iter()
                 .map(|v| (v.key, v.value))
                 .collect(),