Add Prometheus metrics endpoint (#327)

Author: jamescmartinez

compose.yaml

@@ -9,3 +9,10 @@ services:
       postgres
       -c shared_preload_libraries=pg_stat_statements
       -c pg_stat_statements.track=all
+
+  prometheus:
+    image: prom/prometheus
+    ports:
+      - 9090:9090
+    volumes:
+      - ./docker/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro

docker/prometheus/prometheus.yml

@@ -0,0 +1,8 @@
+global:
+  scrape_interval: 15s
+
+scrape_configs:
+  - job_name: openworkflow_dashboard
+    metrics_path: /metrics
+    static_configs:
+      - targets: ["host.docker.internal:3000"]