fix(docker-compose): update comments in metrics configuration for clarity and consistency

docker-compose.metrics.collector.yml

@@ -5,11 +5,11 @@ services:
     env_file:
       - .env
     environment:
-      - NEWT_METRICS_PROMETHEUS_ENABLED=false   # wichtig: direkte /metrics-Erfassung aus
-      - NEWT_METRICS_OTLP_ENABLED=true          # OTLP an den Collector
+      - NEWT_METRICS_PROMETHEUS_ENABLED=false   # important: disable direct /metrics scraping
+      - NEWT_METRICS_OTLP_ENABLED=true          # OTLP to the Collector
       # optional:
       # - NEWT_METRICS_INCLUDE_TUNNEL_ID=false
-    # Falls Newt selbst Ports exponiert, hier NICHT 2112 mappen
+    # If Newt itself exposes ports, DO NOT map 2112 here
     # ports: []
 
   otel-collector:
@@ -19,7 +19,7 @@ services:
       - ./examples/otel-collector.yaml:/etc/otelcol/config.yaml:ro
     ports:
       - "4317:4317"   # OTLP gRPC
-      - "8889:8889"   # Prometheus Exporter (wird von Prometheus gescraped)
+      - "8889:8889"   # Prometheus Exporter (scraped by Prometheus)
 
   prometheus:
     image: prom/prometheus:latest

examples/prometheus.yml

@@ -7,10 +7,10 @@ scrape_configs:
     static_configs:
       - targets: ['newt:2112']  # /metrics
     relabel_configs:
-      # optional: tunnel_id droppen
+    # optional: drop tunnel_id
       - action: labeldrop
         regex: 'tunnel_id'
-      # optional: nur bestimmte sites zulassen
+    # optional: allow only specific sites
       - action: keep
         source_labels: [site_id]
         regex: '(site-a|site-b)'