fix: move GTM injection to non-static ingress

Author: themightychris

k8s.preprod/app-ingress.yaml

@@ -12,6 +12,23 @@ metadata:
     certmanager.k8s.io/cluster-issuer: letsencrypt-prod
     # allow requests larger than 1MiB
     nginx.ingress.kubernetes.io/proxy-body-size: "0"
+    nginx.ingress.kubernetes.io/configuration-snippet: |
+      location / {
+      sub_filter </head>
+        '<!-- Google Tag Manager -->
+        <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+        j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+        'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+        })(window,document,'script','dataLayer','GTM-KBZ6ZKX');</script>
+        <!-- End Google Tag Manager -->';
+      sub_filter </body>
+        '<!-- Google Tag Manager (noscript) -->
+        <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-KBZ6ZKX"
+        height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+        <!-- End Google Tag Manager (noscript) -->'
+        sub_filter_once on;
+      }
 spec:
   tls:
   - hosts:
@@ -64,22 +81,6 @@ metadata:
   annotations:
     nginx.ingress.kubernetes.io/proxy-buffering: "on"  # Important!
     nginx.ingress.kubernetes.io/configuration-snippet: |
-      location / {
-      sub_filter </head>
-        '<!-- Google Tag Manager -->
-        <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
-        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
-        j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
-        'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
-        })(window,document,'script','dataLayer','GTM-KBZ6ZKX');</script>
-        <!-- End Google Tag Manager -->';
-      sub_filter </body>
-        '<!-- Google Tag Manager (noscript) -->
-        <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-KBZ6ZKX"
-        height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
-        <!-- End Google Tag Manager (noscript) -->'
-        sub_filter_once on;
-      }
       proxy_cache static-cache;
       proxy_cache_valid 404 1m;
       proxy_cache_valid 200 10m;