chore: try loki as logging solution

knowledge base/logging.md

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+# Logging
+
+> TODO
+
+Intro
+
+<!-- Remove this line to uncomment if used
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+   1. [Sources](#sources)
+
+## TL;DR
+
+<!-- Uncomment if used
+<details>
+  <summary>Setup</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Usage</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Real world use cases</summary>
+
+```sh
+```
+
+</details>
+-->
+
+## Further readings
+
+- Grafana's [Loki]
+- [Fluentd] / [Fluent Bit]
+- [LogStash]
+
+### Sources
+
+- [Distributed logging for Microservices]
+
+<!--
+  Reference
+  ═╬═Time══
+  -->
+
+<!-- In-article sections -->
+<!-- Knowledge base -->
+[fluent bit]: fluent%20bit.md
+[fluentd]: fluentd.md
+[logstash]: logstash.md
+[loki]: loki.md
+
+<!-- Files -->
+<!-- Upstream -->
+<!-- Others -->
+[distributed logging for microservices]: https://www.geeksforgeeks.org/distributed-logging-for-microservices/