Update docker-compose.yml

The security lables needs to be disabled, otherwise SELinux will deny access to the docker socket.
https://access.redhat.com/solutions/4344161

.examples/docker-compose/with-nginx-proxy/mariadb/fpm/docker-compose.yml

@@ -70,6 +70,8 @@ services:
       - /var/run/docker.sock:/tmp/docker.sock:ro
     networks:
       - proxy-tier
+    security_opt:
+      - label:disable
 
   letsencrypt-companion:
     image: jrcs/letsencrypt-nginx-proxy-companion
@@ -84,7 +86,8 @@ services:
       - proxy-tier
     depends_on:
       - proxy
-
+    security_opt:
+      - label:disable
 # self signed
 #  omgwtfssl:
 #    image: paulczar/omgwtfssl