docs(loki): 添加Loki安装说明和配置文件

添加Loki的Docker安装文档链接和初始化配置命令
新增默认的loki-config.yaml配置文件

dbSer/loki/loki-config.yaml

@@ -0,0 +1,45 @@
+# Loki configuration file
+# https://grafana.com/docs/loki/latest/configuration/
+# version: 3.6.2
+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+
+common:
+  instance_addr: 127.0.0.1
+  path_prefix: /loki
+  storage:
+    filesystem:
+      chunks_directory: /loki/chunks
+      rules_directory: /loki/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+schema_config:
+  configs:
+    - from: 2020-10-24
+      store: tsdb
+      object_store: filesystem
+      schema: v13
+      index:
+        prefix: index_
+        period: 24h
+
+ruler:
+  alertmanager_url: http://localhost:9093
+
+# By default, Loki will send anonymous, but uniquely-identifiable usage and configuration
+# analytics to Grafana Labs. These statistics are sent to https://stats.grafana.org/
+#
+# Statistics help us better understand how Loki is used, and they show us performance
+# levels for most users. This helps us prioritize features and documentation.
+# For more information on what's sent, look at
+# https://github.com/grafana/loki/blob/main/pkg/usagestats/stats.go
+# Refer to the buildReport method to see what goes into a report.
+#
+# If you would like to disable reporting, uncomment the following lines:
+#analytics:
+#  reporting_enabled: false

dbSer/loki/readme.md

@@ -2,4 +2,8 @@
 
 [loki docker 安装文档](https://grafana.com/docs/loki/latest/setup/install/docker/)
 
-
+```
+mkdir -p loki
+cd loki
+wget https://raw.githubusercontent.com/grafana/loki/main/cmd/loki/loki-config.yaml -O loki-config.yaml
+```