Dockerfile-centos: fix for non-continuation lines

Author: bryanlatten

Dockerfile-centos

@@ -22,7 +22,7 @@ COPY ./container/root /
 
 # - Set nginx to listen on defined port
 # - NOTE: order of operations is important, new config had to already installed from repo (above)
-# - Make temp directory for .nginx runtime files \
+# - Make temp directory for .nginx runtime files
 # - Update nginx.conf user
 # - Some operations can be completely removed once this ticket is resolved:
 # - https://trac.nginx.org/nginx/ticket/1243