remove container after regression test

xtask/src/main.rs

@@ -252,6 +252,7 @@ fn run_production(port: u16) -> Result<Child, DynError> {
             format!("ROCKET_PORT={}", port).as_str(),
             "--network=host",
             "-i",
+            "--rm",
             "docker.mkaenner.de/snake:latest",
         ])
         .spawn()?;