fix(monitoring): add loki to back-tier network

monitoring/compose.yaml

@@ -105,7 +105,15 @@ services:
     ports:
       - "3100:3100"
     command: -config.file=/etc/loki/loki.yaml
+    networks:
+      - back-tier
     volumes:
       - ./loki/loki.yaml:/etc/loki/loki.yaml:ro
       - loki_data:/var/lib/loki
+    healthcheck:
+      test: wget --quiet --tries=1 --output-document=- http://localhost:3100/ready | grep -q -w ready || exit 1
+      start_period: 20s
+      interval: 10s
+      timeout: 1s
+      retries: 12  # try for 2 minutes