Move Alpine variants

.travis.yml

@@ -10,10 +10,10 @@ env:
   - VARIANT=php7.0/fpm
   - VARIANT=php7.1/fpm
   - VARIANT=php7.2/fpm
-  - VARIANT=fpm-alpine
-  - VARIANT=fpm-php7.0-alpine
-  - VARIANT=fpm-php7.1-alpine
-  - VARIANT=fpm-php7.2-alpine
+  - VARIANT=php5.6/fpm-alpine
+  - VARIANT=php7.0/fpm-alpine
+  - VARIANT=php7.1/fpm-alpine
+  - VARIANT=php7.2/fpm-alpine
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images

update.php

@@ -74,7 +74,7 @@ if (!isset($signature))
 }
 
 $phpVersions = [];
-$platforms   = ['apache', 'fpm'];
+$platforms   = ['apache', 'fpm', 'fpm-alpine'];
 
 /** @var DirectoryIterator $dir */
 foreach (new DirectoryIterator(__DIR__) as $dir)