NG-UI Update nginx for CVE

Security patch 1.14.0-0ubuntu1.9 has been issued

Fixes BUG-1555

Change-Id: I61811a6a1494138b4715dfcbf4c7959e10916ba4
Signed-off-by: beierlm <mark.beierl@canonical.com>
(cherry picked from commit f6ec22e2e4bc832511a4b7da112826e032e187c8)
diff --git a/Dockerfile b/Dockerfile
index 5717b7a..a3f7400 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,9 +25,6 @@
 #
 
 FROM ubuntu:18.04
-ENV LANG en_IN.UTF-8
-ENV LC_ALL en_IN.UTF-8
-ENV LANGUAGE en_IN.UTF-8
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install \
@@ -41,3 +38,7 @@
 
 RUN python3 -m easy_install pip==21.0.1
 RUN pip3 install tox==3.22.0
+
+ENV LC_ALL C.UTF-8
+ENV LANG C.UTF-8
+