feat(nginx): Add beautiful custom error page

infrastructure/nginx-system/release.yaml

@@ -91,6 +91,8 @@ data:
         enable-brotli: "true"
         use-http2: "true"
         proxy-buffer-size: 8k
+        custom-http-errors: >-
+          401,403,404,500,501,502,503
       replicaCount: 2
       minAvailable: 1
       resources:
@@ -160,6 +162,16 @@ data:
               annotations:
                 description: Too many 4XXs
                 summary: More than 5% of all requests returned 4XX, this requires your attention
+    defaultBackend:
+      enabled: true
+      image:
+        repository: ghcr.io/tarampampam/error-pages
+        tag: 2.26.0
+      extraEnvs:
+      - name: TEMPLATE_NAME # Optional: change the default theme
+        value: connection
+      - name: SHOW_DETAILS # Optional: enables the output of additional information on error pages
+        value: 'false'
     rbac:
       create: true
       scope: false