fix: add grafana volume

Author: naman22a

.gitignore

@@ -45,3 +45,4 @@ yarn-error.log*
 /pgdata
 /redis-data
 /loki-data
+/grafana-data

docker-compose.yml

@@ -390,6 +390,8 @@ services:
         ports:
             - "3001:3000"
         restart: unless-stopped
+        volumes:
+            - ./grafana-data:/var/lib/grafana
 
     loki:
         image: grafana/loki:latest
@@ -403,6 +405,7 @@ services:
 volumes:
     pgdata:
     redis-data:
+    grafana-data:
 
 networks:
     default: