Add Grafana Loki deployment

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diff --git a/f3s/loki/Justfile b/f3s/loki/Justfile
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+install:
+    helm repo add grafana https://grafana.github.io/helm-charts || true
+    helm repo update
+    kubectl apply -f persistent-volumes.yaml
+    helm install loki grafana/loki --namespace monitoring -f values.yaml
+
+uninstall:
+    helm uninstall loki --namespace monitoring
+    kubectl delete -f persistent-volumes.yaml
+
+upgrade:
+    helm upgrade loki grafana/loki --namespace monitoring -f values.yaml
diff --git a/f3s/loki/README.md b/f3s/loki/README.md
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+# Grafana Loki
+
+Log aggregation system for your k3s cluster.
+
+## Prerequisites
+
+Create the data directory on your host:
+
+```bash
+sudo mkdir -p /data/nfs/k3svolumes/loki/data
+sudo chown 10001:10001 /data/nfs/k3svolumes/loki/data
+```
+
+## Install
+
+```bash
+just install
+```
+
+## Configure Grafana
+
+Add Loki as a data source in Grafana:
+- Type: Loki
+- URL: `http://loki-gateway.monitoring.svc.cluster.local`
diff --git a/f3s/loki/persistent-volumes.yaml b/f3s/loki/persistent-volumes.yaml
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+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: loki-data-pv
+  labels:
+    type: local
+    app: loki
+spec:
+  capacity:
+    storage: 10Gi
+  volumeMode: Filesystem
+  accessModes:
+    - ReadWriteOnce
+  persistentVolumeReclaimPolicy: Retain
+  hostPath:
+    path: /data/nfs/k3svolumes/loki/data
+    type: DirectoryOrCreate
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: loki-data-pvc
+  namespace: monitoring
+spec:
+  storageClassName: ""
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Gi
+  selector:
+    matchLabels:
+      type: local
+      app: loki
diff --git a/f3s/loki/values.yaml b/f3s/loki/values.yaml
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+deploymentMode: SingleBinary
+
+loki:
+  auth_enabled: false
+  commonConfig:
+    replication_factor: 1
+  storage:
+    type: filesystem
+  schemaConfig:
+    configs:
+      - from: "2024-01-01"
+        store: tsdb
+        object_store: filesystem
+        schema: v13
+        index:
+          prefix: index_
+          period: 24h
+
+singleBinary:
+  replicas: 1
+  persistence:
+    enabled: true
+    existingClaim: loki-data-pvc
+
+read:
+  replicas: 0
+
+write:
+  replicas: 0
+
+backend:
+  replicas: 0
+
+gateway:
+  enabled: false
+
+chunksCache:
+  enabled: false
+
+resultsCache:
+  enabled: false
+
+lokiCanary:
+  enabled: false
+
+test:
+  enabled: false