feat(api): add GetContainer endpoint and Docker host ID mapping

- Implemented GetContainer function to retrieve container details by ID.
- Introduced idDockerHostMap for mapping container IDs to Docker hosts.
- Updated Container struct to allow omitting the State field in JSON responses.

internal/docker/id_lookup.go

@@ -0,0 +1,19 @@
+package docker
+
+import (
+	"github.com/puzpuzpuz/xsync/v4"
+)
+
+var idDockerHostMap = xsync.NewMap[string, string]()
+
+func GetDockerHostByContainerID(id string) (string, bool) {
+	return idDockerHostMap.Load(id)
+}
+
+func SetDockerHostByContainerID(id, host string) {
+	idDockerHostMap.Store(id, host)
+}
+
+func DeleteDockerHostByContainerID(id string) {
+	idDockerHostMap.Delete(id)
+}