feat(docker): add full grafana, prometheus, tempo setup for local dev

This is a very useful stack for local development as well, by allowing
to easily access a local grafana instance and look at the accessed
endpoints, query usage and durations etc.
As a nice side effect this also makes sure we have an easy way to
actually test any changes to the opentelemetry integration in an actual
environment instead of just listening to a raw socket.

docker/config/tempo.yml

@@ -0,0 +1,54 @@
+---
+stream_over_http_enabled: true
+server:
+  http_listen_address: tempo
+  http_listen_port: 3200
+  log_level: info
+
+query_frontend:
+  search:
+    duration_slo: 5s
+    throughput_bytes_slo: 1.073741824e+09
+  trace_by_id:
+    duration_slo: 5s
+
+distributor:
+  receivers:
+    otlp:
+      protocols:
+        http:
+          endpoint: tempo:4318
+  log_received_spans:
+    enabled: false
+  metric_received_spans:
+    enabled: false
+
+ingester:
+  max_block_duration: 5m
+
+compactor:
+  compaction:
+    block_retention: 1h
+
+metrics_generator:
+  registry:
+    external_labels:
+      source: tempo
+  storage:
+    path: /tmp/tempo/generator/wal
+    remote_write:
+      - url: http://prometheus:9090/api/v1/write
+        send_exemplars: true
+  traces_storage:
+    path: /tmp/tempo/generator/traces
+
+storage:
+  trace:
+    backend: local
+    wal:
+      path: /tmp/tempo/wal
+    local:
+      path: /tmp/tempo/blocks
+
+overrides:
+  metrics_generator_processors: [service-graphs, span-metrics, local-blocks]