fix: use named volume for prometheus config, populate on remote host

.gitea/workflows/cd.yml

@@ -37,10 +37,14 @@ jobs:
           NGINX_PORT=80
           EOF
 
-      - name: Seed Prometheus config
+      - name: Seed Prometheus config on remote host
+        env:
+          DOCKER_HOST: tcp://192.168.88.40:2375
         run: |
-          mkdir -p monitoring/prometheus
-          cat > monitoring/prometheus/prometheus.yml << 'EOF'
+          docker run --rm \
+            -v prometheus-config:/etc/prometheus \
+            alpine:latest sh -c '
+              cat > /etc/prometheus/prometheus.yml << "PROMEOF"
           global:
             scrape_interval: 15s
             evaluation_interval: 15s
@@ -49,29 +53,29 @@ jobs:
             - "/etc/prometheus/alerts.yml"
 
           scrape_configs:
-            - job_name: 'chat'
+            - job_name: "chat"
               static_configs:
-                - targets: ['chat:3000']
-            - job_name: 'playout'
+                - targets: ["chat:3000"]
+            - job_name: "playout"
               static_configs:
-                - targets: ['playout:8081']
-            - job_name: 'nginx'
+                - targets: ["playout:8081"]
+            - job_name: "nginx"
               static_configs:
-                - targets: ['nginx-exporter:9113']
-            - job_name: 'redis'
+                - targets: ["nginx-exporter:9113"]
+            - job_name: "redis"
               static_configs:
-                - targets: ['redis-exporter:9121']
-            - job_name: 'postgres'
+                - targets: ["redis-exporter:9121"]
+            - job_name: "postgres"
               static_configs:
-                - targets: ['postgres-exporter:9187']
-            - job_name: 'node'
+                - targets: ["postgres-exporter:9187"]
+            - job_name: "node"
               static_configs:
-                - targets: ['node-exporter:9100']
-            - job_name: 'prometheus'
+                - targets: ["node-exporter:9100"]
+            - job_name: "prometheus"
               static_configs:
-                - targets: ['localhost:9090']
-          EOF
-          cat > monitoring/prometheus/alerts.yml << 'EOF'
+                - targets: ["localhost:9090"]
+          PROMEOF
+              cat > /etc/prometheus/alerts.yml << "ALERTSEOF"
           groups:
             - name: linearvoid
               rules:
@@ -117,7 +121,8 @@ jobs:
                     severity: warning
                   annotations:
                     summary: "Low disk space"
-          EOF
+          ALERTSEOF
+            '
 
       - name: Deploy with docker-compose
         env: