Enhance Docker setup with logging and monitoring features

- Added logging configuration to WSGI for persistent log collection.
- Updated Docker Compose files for local and development environments, including Redis, PostgreSQL, and Grafana services.
- Introduced Promtail configuration for log scraping and integration with Loki.
- Created application log directory in Dockerfile for log persistence.

docker/docker-compose.dev.yml

@@ -15,10 +15,55 @@ services:
     command: []
     volumes:
       - ../:/usr/src/app:cached
+      # Mount the app log directory so logs are visible on the host at ./logs
+      - ../logs:/var/log/rad
   nginx:
     # Development nginx override: mount a simplified config that does not
     # reference LetsEncrypt certs so the container can start without real
     # certificates present on the host.
+    image: nginx:1.25-alpine
     volumes:
       - ../deploy/nginx/dev.conf:/etc/nginx/conf.d/default.conf:ro
 
+  loki:
+    image: grafana/loki:2.8.2
+    command: -config.file=/etc/loki/local-config.yaml
+    ports:
+      - "3100:3100"
+    volumes:
+      - ./loki-config/local-config.yaml:/etc/loki/local-config.yaml:ro
+      - ./loki-data:/loki
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "wget -qO- http://localhost:3100/ready || exit 1"]
+      interval: 5s
+      timeout: 3s
+      retries: 6
+
+  promtail:
+    image: grafana/promtail:2.8.2
+    volumes:
+      - ../logs:/var/log/rad:ro
+      - ./promtail-config.yml:/etc/promtail/promtail-config.yml:ro
+    command: -config.file=/etc/promtail/promtail-config.yml
+    depends_on:
+      - loki
+    restart: unless-stopped
+
+  grafana:
+    image: grafana/grafana:10.2.0
+    ports:
+      - "3000:3000"
+    environment:
+      - GF_SECURITY_ADMIN_PASSWORD=admin
+    volumes:
+      - grafana-data:/var/lib/grafana
+    depends_on:
+      loki:
+        condition: service_healthy
+    restart: unless-stopped
+
+volumes:
+  grafana-data:
+  loki-data:
+