feat: add setup-prometheus target and update Prometheus service configuration

makefile

@@ -238,7 +238,7 @@ deploy-grafana: pull setup-grafana
 	set +a ;\
 	docker stack deploy --compose-file ./swarm/grafana.yml grafana ;\
 	}
-deploy-prometheus: pull
+deploy-prometheus: pull setup-prometheus
 	{ \
 	echo "Deploying the prometheus stack..." ;\
 	set -a ;\
@@ -246,6 +246,12 @@ deploy-prometheus: pull
 	set +a ;\
 	docker stack deploy --compose-file ./swarm/prometheus.yml prometheus ;\
 	}
+setup-prometheus:
+	{ \
+	echo "Setting up prometheus config on host..." ;\
+	mkdir -p /var/data/prometheus ;\
+	cp -n ./swarm/prometheus/prometheus.yml /var/data/prometheus/prometheus.yml 2>/dev/null || echo "prometheus.yml already exists, skipping" ;\
+	}
 deploy-nodepad: pull
 	{ \
 	echo "Building the nodepad image..." ;\

swarm/grafana.yml

@@ -19,7 +19,6 @@ services:
       - /var/data/grafana/grafana.ini:/etc/grafana/grafana.ini:ro
       - /var/data/grafana/provisioning:/etc/grafana/provisioning:ro
       - /var/data/grafana/dashboards:/var/lib/grafana/dashboards:ro
-      - ./grafana/provisioning/datasources/prometheus.yml:/etc/grafana/provisioning/datasources/prometheus.yml:ro
     networks:
       - traefik-public
     deploy:

swarm/prometheus.yml

@@ -18,7 +18,7 @@ services:
     volumes:
       - prometheus_data:/prometheus
       - /var/data/prometheus/rules:/etc/prometheus/rules:ro
-      - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - /var/data/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
     networks:
       - traefik-public
     ports: