[feature] replace promtail with grafana agent

improve grafana provisioning

agent/agent.yaml

@@ -0,0 +1,49 @@
+logs:
+  configs:
+    - name: local
+      clients:
+        - url: "http://${AGENT_LOKI_URL}/loki/api/v1/push"
+      scrape_configs:
+        - docker_sd_configs:
+            - host: unix:///var/run/docker.sock
+              refresh_interval: 10s
+          job_name: docker
+          pipeline_stages:
+            - drop:
+                drop_counter_reason: reject_old_samples
+                older_than: 30m
+            - static_labels:
+                job: docker
+          relabel_configs:
+            - regex: /(.*)
+              source_labels: [__meta_docker_container_name]
+              target_label: container_name
+            - source_labels: [__meta_docker_container_id]
+              target_label: container_id
+            - source_labels: [__meta_docker_container_log_stream]
+              target_label: stream
+            - source_labels: [__meta_docker_container_label_com_docker_compose_project]
+              target_label: compose_project
+            - source_labels: [__meta_docker_container_label_org_label_schema_vcs_ref]
+              target_label: vcs_ref
+            - source_labels: [__meta_docker_container_label_org_label_schema_version]
+              target_label: image_version
+  positions_directory: /opt/positions
+
+traces:
+  configs:
+    - name: tempo
+      remote_write:
+        - endpoint: "http://${AGENT_TEMPO_URL}"
+          insecure: true
+      receivers:
+        otlp:
+          protocols:
+            http:
+            grpc:
+      automatic_logging:
+        backend: "logs_instance"
+        logs_instance_name: "local"
+        roots: true
+server:
+  log_level: info