Merge pull request 'Update renovate.json' (#13) from sixsmith/taiga:sixsmith-patch-1 into main

Reviewed-on: #13

compose.yml

@@ -227,7 +227,7 @@ services:
       - internal
 
   web:
-    image: nginx:1.31-alpine
+    image: nginx:1.19-alpine
     configs:
       - source: nginx_conf
         target: /etc/nginx/conf.d/default.conf

renovate.json

@@ -2,5 +2,13 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:recommended"
+  ],
+  "packageRules": [
+    {
+      "matchDatasources": [
+        "docker"
+      ],
+      "pinDigests": true
+    }
   ]
 }