refactor: clean up code and fix race condition in idlewatcher

internal/docker/idlewatcher/state.go

@@ -0,0 +1,39 @@
+package idlewatcher
+
+func (w *Watcher) running() bool {
+	return w.state.Load().running
+}
+
+func (w *Watcher) ready() bool {
+	return w.state.Load().ready
+}
+
+func (w *Watcher) error() error {
+	return w.state.Load().err
+}
+
+func (w *Watcher) setReady() {
+	w.state.Store(&containerState{
+		running: true,
+		ready:   true,
+	})
+}
+
+func (w *Watcher) setStarting() {
+	w.state.Store(&containerState{
+		running: true,
+		ready:   false,
+	})
+}
+
+func (w *Watcher) setNapping() {
+	w.setError(nil)
+}
+
+func (w *Watcher) setError(err error) {
+	w.state.Store(&containerState{
+		running: false,
+		ready:   false,
+		err:     err,
+	})
+}