some general updates

docker-compose/prometheus/docker-compose.yml

@@ -0,0 +1,18 @@
+version: '3'
+
+volumes:
+  prometheus-data:
+    driver: local
+
+services:
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: prometheus
+    ports:
+      - "9090:9090"
+    volumes:
+      - /etc/prometheus:/etc/prometheus
+      - prometheus-data:/prometheus
+    restart: unless-stopped
+    command:
+      - "--config.file=/etc/prometheus/prometheus.yml"