Fixing specified Dockerfile name (laradock#745)

Author: gentcys

docker-compose.yml

@@ -34,7 +34,7 @@ services:
           - NODE_VERSION=${WORKSPACE_NODE_VERSION}
           - YARN_VERSION=${WORKSPACE_YARN_VERSION}
           - TZ=${WORKSPACE_TIMEZONE}
-        dockerfile: "dockerfile-${PHP_VERSION}"
+        dockerfile: "Dockerfile-${PHP_VERSION}"
       volumes_from:
         - applications
       extra_hosts:
@@ -65,7 +65,7 @@ services:
           - INSTALL_MYSQLI=${PHP_FPM_INSTALL_MYSQLI}
           - INSTALL_TOKENIZER=${PHP_FPM_INSTALL_TOKENIZER}
           - INSTALL_INTL=${PHP_FPM_INSTALL_INTL}
-        dockerfile: "dockerfile-${PHP_VERSION}"
+        dockerfile: "Dockerfile-${PHP_VERSION}"
       volumes_from:
         - applications
       expose: