Add some info to readme

.gitignore

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+data/*

README.md

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-# mon-test
+# cyber-gov backend?
 
+Simple Prometheus setup for monitoring websites, with blackbox-exporter and Grafana. 
+
+Testing data source for target discovery is located in branch `pages` and is served on `https://mdivecky.nolog.page/mon-test/targets.json` 
+
+
+# Setup
+
+```bash
+mkdir -p ./data/prometheus
+mkdir -p ./data/grafana
+chown -R 1000:1000 ./data/*
+# Or switch to docker volumes for prometheus and Grafana, if you don't want to deal with permissions
+
+docker compose up -d 
+
+# -> Goto http://localhost:3000
+# Login to Grafana with admin:admin
+# Add Prometheus datasource, with URL "http://prometheus:9090"
+# Import or create some dashboards
+# Profit $$$
+```

compose.yml

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+
+services:
+  blackbox:
+    image: prom/blackbox-exporter:latest
+    command:
+      - --config.file=/etc/blackbox/blackbox.yml
+    volumes:
+      - ./config/blackbox:/etc/blackbox
+    ports:
+      - 127.0.0.1:9115:9115 # Debug only
+
+  prometheus:
+    image: prom/prometheus:latest
+    user: 1000:1000
+    ports:
+      - 127.0.0.1:9094:9090 # Debug only
+    volumes:
+      - ./config/prometheus:/etc/prometheus
+      - ./data/prometheus:/prometheus
+    command: --web.enable-lifecycle --web.enable-remote-write-receiver --config.file=/etc/prometheus/prometheus.yml
+    restart: unless-stopped
+
+  grafana:
+    image: grafana/grafana-oss:latest
+    restart: unless-stopped
+    user: 1000:1000
+    environment:
+      GF_DATABASE_TYPE: postgres
+      GF_DATABASE_HOST: grafana_db:5432
+      GF_DATABASE_NAME: grafana
+      GF_DATABASE_USER: grafana
+      GF_DATABASE_PASSWORD: grafana
+      GF_DATABASE_SSL_MODE: disable
+      #GF_SERVER_ROOT_URL: "https://grafana.druit.org/"
+    depends_on:
+        - grafana_db
+    ports:
+      - 3000:3000
+    volumes:
+      - ./data/grafana:/var/lib/grafana
+#      - ./config/grafana/provisioning:/etc/grafana/provisioning
+#      - ./config/grafana/dashboards:/var/lib/grafana/dashboards
+
+  grafana_db:
+    image: postgres:15
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: grafana
+      POSTGRES_USER: grafana
+      POSTGRES_PASSWORD: grafana
+    volumes:
+      - ./data/grafana-db:/var/lib/postgresql/data

config/blackbox/blackbox.yml

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+modules:
+  http_2xx:
+    prober: http
+    timeout: 60s
+    http:
+      method: GET
+      valid_http_versions: ["HTTP/1.1", "HTTP/2.0"]
+      preferred_ip_protocol: "ip4"

config/prometheus/prometheus.yml

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+global:
+  scrape_interval: 20s
+  scrape_timeout: 10s
+  evaluation_interval: 20s
+
+scrape_configs:
+  - job_name: 'blackbox/primary'
+    metrics_path: /probe
+    scrape_interval: 60s
+    scrape_timeout: 45s
+    params:
+        module: [http_2xx]
+    http_sd_configs:
+        - url: https://mdivecky.nolog.page/mon-test/targets.json
+          refresh_interval: 600s
+    relabel_configs:
+      - source_labels: [check_url]
+        target_label: __address__
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - target_label: __address__
+        replacement: blackbox:9115

targets.json

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-[
-    {
-        "targets": [
-            "nolog.cz"
-        ],
-        "labels": {
-            "check_url": "http://nolog.cz/"
-        }
-    },
-    {
-        "targets": [
-            "cyberladies.cz"
-        ],
-        "labels": {
-            "check_url": "https://www.cyberladies.cz/"
-        }
-    }
-]