fix: update SnapOtter service environment variables in compose.yaml

Co-authored-by: Copilot <copilot@github.com>

nodes/heimdall/snapotter/compose.yaml

@@ -8,9 +8,21 @@ services:
     networks:
       - proxy-net
     environment:
-      - AUTH_ENABLED=false
+      - AUTH_ENABLED=${AUTH_ENABLED}
-      # - DEFAULT_USERNAME=admin
+      #Set to true to require login. The Docker image defaults to true.
-      # - DEFAULT_PASSWORD=admin
+
+      - DEFAULT_USERNAME=${DEFAULT_USERNAME}
+      #Username for the initial admin account. Only used on first run.
+
+      - DEFAULT_PASSWORD=${DEFAULT_PASSWORD}
+      #Password for the initial admin account. Change this after first login.
+
+      - MAX_USERS=${MAX_USERS}
+      # Maximum number of registered user accounts. Set to 0 for unlimited.
+
+      - SESSION_DURATION_HOURS=${SESSION_DURATION_HOURS}
+      #Login session lifetime in hours (default is 7 days).
+      
     restart: unless-stopped
     labels:
       - "traefik.enable=true"