Update Prometheus Docker configuration and remove command overrides in stack.yaml

observability/prometheus/Dockerfile

@@ -4,6 +4,7 @@ FROM prom/prometheus:latest
 
 # Copy Prometheus configuration
 COPY prometheus.yaml /etc/prometheus/prometheus.yaml
+COPY prometheus-compose.yaml /etc/prometheus/prometheus-compose.yaml
 
 # Switch to default user and expose port
 EXPOSE 9090

observability/prometheus/prometheus-compose.yaml

@@ -1,4 +1,5 @@
 # Prometheus main configuration
+# This configuration is adapted for Docker Compose environment
 
 global:
   scrape_interval: 30s