Loki | Alpine-Loki (#11048)

* Add loki (ct)

* add alpine variant in pr

* Add info note about Promtail installation to loki.json

Added an informational note to loki.json indicating that Promtail can be optionally installed during setup to collect and ship logs to Loki.

* add header

* refactor local_ip

* fix json

* Update alpine-loki-install.sh

* refactor

* refactor

* fix

---------

Co-authored-by: push-app-to-main[bot] <203845782+push-app-to-main[bot]@users.noreply.github.com>
Co-authored-by: CanbiZ (MickLesk) <47820557+MickLesk@users.noreply.github.com>
Co-authored-by: Tobias <96661824+CrazyWolf13@users.noreply.github.com>

frontend/public/json/loki.json

@@ -0,0 +1,51 @@
+{
+  "name": "Loki",
+  "slug": "loki",
+  "categories": [
+    9
+  ],
+  "date_created": "2026-01-22",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 3100,
+  "documentation": "https://grafana.com/docs/loki/latest/",
+  "website": "https://github.com/grafana/loki",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/loki.webp",
+  "config_path": "Debian: /etc/loki/config.yml | Alpine: /etc/loki/loki-local-config.yaml",
+  "description": "Grafana Loki is a set of open source components that can be composed into a fully featured logging stack. A small index and highly compressed chunks simplifies the operation and significantly lowers the cost of Loki.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/loki.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 512,
+        "hdd": 2,
+        "os": "debian",
+        "version": "13"
+      }
+    },
+    {
+      "type": "alpine",
+      "script": "ct/alpine-loki.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 256,
+        "hdd": 1,
+        "os": "alpine",
+        "version": "3.23"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "Promtail can be optionally installed during setup to collect and ship logs to Loki.",
+      "type": "info"
+    }
+  ]
+}