updated docker information

docker/dev/logging/promtail-config.yml

@@ -0,0 +1,17 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /var/log/promtail/positions.yaml
+
+clients:
+  - url: http://loki:3100/loki/api/v1/push
+
+scrape_configs:
+  - job_name: laravel_logs
+    static_configs:
+      - labels:
+          app: fotospiel
+          service: laravel
+          __path__: /var/www/html/storage/logs/*.log