Fixed Label in Dockerfile

Author: erseco

Dockerfile

@@ -1,6 +1,6 @@
 FROM alpine:3.12
 LABEL Maintainer="Tim de Pater <[email protected]>" \
-      Description="Lightweight container with Nginx 1.16 & PHP-FPM 7.3 based on Alpine Linux."
+      Description="Lightweight container with Nginx 1.18 & PHP-FPM 7.3 based on Alpine Linux."
 
 # Install packages and remove default server definition
 RUN apk --no-cache add php7 php7-fpm php7-opcache php7-mysqli php7-json php7-openssl php7-curl \