fix: last fix for firelens confgit add .

firelens.conf

@@ -1,3 +1,8 @@
+[PARSER]
+    Name container_id_parser
+    Format regex
+    Regex ^(?<container_id>.{8}).*$
+
 [FILTER]
     Name modify
     Match *
@@ -25,9 +30,9 @@
     Name parser
     Match *
     Key_Name container_id
-    Parser regex
-    Regex ^(?<container_id>.{8}).*$
-    Reserve_Data Off
+    Parser container_id_parser
+    Preserve_Key On
+    Reserve_Data On
 
 [OUTPUT]
     Name http