Update Link to https

Author: Jakobu5

README.md

@@ -1,5 +1,5 @@
 # Docker PHP-FPM 7.3 & Nginx 1.18 on Alpine Linux
-Example PHP-FPM 7.3 & Nginx 1.18 setup for Docker, build on [Alpine Linux](http://www.alpinelinux.org/).
+Example PHP-FPM 7.3 & Nginx 1.18 setup for Docker, build on [Alpine Linux](https://www.alpinelinux.org/).
 The image is only +/- 35MB large.
 
 Repository: https://github.com/TrafeX/docker-php-nginx
@@ -95,4 +95,4 @@ RUN composer install \
 # dependencies downloaded by composer
 FROM trafex/alpine-nginx-php7
 COPY --chown=nginx --from=composer /app /var/www/html
-```
+```