Add configuration files and compose setups for Grafana Alloy, Backrest, Loki, and Prometheus

prometheus/compose.yml

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+
+name: prometheus
+
+services:
+  prometheus:
+    image: docker.io/prom/prometheus
+    container_name: prometheus
+    ports:
+      - 9090:9090
+    command: "--config.file=/etc/prometheus/prometheus.yaml --web.enable-remote-write-receiver"
+    volumes:
+      - ./config/prometheus.yaml:/etc/prometheus/prometheus.yaml:ro
+      - prometheus-data:/prometheus
+    restart: unless-stopped
+    networks:
+      - proxy
+
+networks:
+  proxy:
+    external: true
+
+volumes:
+  prometheus-data:
+    driver: local

prometheus/config/prometheus.yaml

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+---
+global:
+  scrape_interval: 15s # By default, scrape targets every 15 seconds.
+
+  # Attach these labels to any time series or alerts when communicating with
+  # external systems (federation, remote storage, Alertmanager).
+  # external_labels:
+  #  monitor: 'codelab-monitor'
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: "prometheus"
+    # Override the global default and scrape targets from this job every 5 seconds.
+    scrape_interval: 5s
+    static_configs:
+      - targets: ["localhost:9090"]
+# Example job for node_exporter
+# - job_name: 'node_exporter'
+#   static_configs:
+#     - targets: ['node_exporter:9100']
+
+# Example job for cadvisor
+# - job_name: 'cadvisor'
+#   static_configs:
+#     - targets: ['cadvisor:8080']