chore: use mirrored registry for logging stack images (refs #86)

- Update Loki, Promtail, Grafana to use REGISTRY_MIRRORS
- Add grafana/loki, grafana/promtail, grafana/grafana to mirror script

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -266,7 +266,7 @@ services:
 
   # Log Aggregation - Loki
   mvp-loki:
-    image: grafana/loki:2.9.0
+    image: ${REGISTRY_MIRRORS:-git.motovaultpro.com/egullickson/mirrors}/loki:2.9.0
     container_name: mvp-loki
     restart: unless-stopped
     volumes:
@@ -288,7 +288,7 @@ services:
 
   # Log Aggregation - Promtail
   mvp-promtail:
-    image: grafana/promtail:2.9.0
+    image: ${REGISTRY_MIRRORS:-git.motovaultpro.com/egullickson/mirrors}/promtail:2.9.0
     container_name: mvp-promtail
     restart: unless-stopped
     volumes:
@@ -308,7 +308,7 @@ services:
 
   # Log Aggregation - Grafana
   mvp-grafana:
-    image: grafana/grafana:10.0.0
+    image: ${REGISTRY_MIRRORS:-git.motovaultpro.com/egullickson/mirrors}/grafana:10.0.0
     container_name: mvp-grafana
     restart: unless-stopped
     environment:

scripts/ci/mirror-base-images.sh

@@ -17,6 +17,9 @@ IMAGES=(
   "python:3.11-slim"
   "docker:24.0"
   "docker:24.0-dind"
+  "grafana/loki:2.9.0"
+  "grafana/promtail:2.9.0"
+  "grafana/grafana:10.0.0"
 )
 
 echo "========================================"