tech(docker): add default writer for influxdb

docker/blocks/influxdb/fig

@@ -4,3 +4,11 @@ influxdb:
     - "2004:2004"
     - "8083:8083"
     - "8086:8086"
+
+fake-data-gen:
+  image: grafana/fake-data-gen
+  net: bridge
+  environment:
+    FD_DATASOURCE: influxdb
+    FD_PORT: 8086
+