added loki and nginx geolocation

docker/promtail/rootfs/promail/config.yml

@@ -0,0 +1,20 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: ${PROMTAIL_LOKISERVER_ADDRESS}/loki/api/v1/push
+
+scrape_configs:
+- job_name: nginx
+  static_configs:
+  - targets:
+      - localhost
+    labels:
+      job: nginx
+      host: wanreverseproxy
+      agent: promtail
+      __path__: /mnt/nginx-logs/access_json_analytics.log