fix(nfs-server): update base image of nfs-server from alpine:latest to alpine:3.14 (#130)

This commit updates the base image of nfs-server
from alpine:latest to alpine:3.14. Alpine 3.14 will
install fixed version of nfs-utils(2.5.3) so that nfs-utils
version remains unchanged on different builds.

Signed-off-by: mittachaitu <[email protected]>

Author: sai chaithanya

nfs-server-container/Dockerfile

@@ -9,7 +9,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine:latest
+FROM alpine:3.14
 #LABEL maintainer "Steven Iveson <[email protected]>"
 #LABEL source "https://github.com/sjiveson/nfs-server-alpine"
 #LABEL branch "master"