Dockerfile: healthcheck dont use sh

- interpreter already set in the scripts not need to use /bin/sh -c
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

vlsd/Dockerfile

@@ -61,7 +61,7 @@ VOLUME ["${VLS_DATA}"]
 USER vls
 
 HEALTHCHECK --interval=10s --timeout=10s --start-period=10s \
-    CMD ["/bin/sh", "-c", "/healthcheck.sh"]
+    CMD ["/healthcheck.sh"]
 
 ENTRYPOINT ["/entrypoint.sh"]