update example.yml with container names specified in docker-compose, to support running either a dev or production containers off the same configs

.config/example.yml

@@ -34,7 +34,7 @@ port: 3000
 #───┘ PostgreSQL configuration └────────────────────────────────
 
 db:
-  host: localhost
+  host: calckey_db
   port: 5432
 
   # Database name
@@ -55,7 +55,7 @@ db:
 #───┘ Redis configuration └─────────────────────────────────────
 
 redis:
-  host: localhost
+  host: calckey_redis
   port: 6379
   #family: 0  # 0=Both, 4=IPv4, 6=IPv6
   #pass: example-pass
@@ -66,7 +66,7 @@ redis:
 #───┘ Elasticsearch configuration └─────────────────────────────
 
 #elasticsearch:
-#  host: localhost
+#  host: calckey_es
 #  port: 9200
 #  ssl: false
 #  user: