[OPB-37] adding loki log collector

upgrading to newer abstracto version
adding some info to readme

deployment/image-packaging/src/main/docker/promtail/Dockerfile

@@ -0,0 +1,4 @@
+ARG PROMTAIL_VERSION
+FROM grafana/promtail:${PROMTAIL_VERSION}
+MAINTAINER Sheldan
+ADD promtail.yaml /mnt/config/promtail-config.yaml

deployment/image-packaging/src/main/docker/promtail/promtail.yaml

@@ -0,0 +1,17 @@
+server:
+  disable: true
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: http://loki:3100/loki/api/v1/push
+
+scrape_configs:
+  - job_name: system
+    static_configs:
+      - targets:
+          - localhost
+        labels:
+          job: oneplus-bot-logs
+          __path__: /logs/*.log