📈(frontend) setup a reverse proxy for analytics

Proxy analytics requests through our backend to minimize
ad-blockers impact. I configured the Helm Charts following
PostHog official documentation.

src/helm/env.d/dev/values.meet.yaml.gotmpl

@@ -95,3 +95,8 @@ ingress:
 ingressAdmin:
   enabled: true
   host: meet.127.0.0.1.nip.io
+
+posthog:
+  ingress:
+    enabled: false
+

src/helm/env.d/preprod/values.meet.yaml.gotmpl

@@ -125,3 +125,12 @@ ingressAdmin:
     cert-manager.io/cluster-issuer: letsencrypt-prod
     nginx.ingress.kubernetes.io/auth-signin: https://oauth2-proxy-preprod.beta.numerique.gouv.fr/oauth2/start
     nginx.ingress.kubernetes.io/auth-url: https://oauth2-proxy-preprod.beta.numerique.gouv.fr/oauth2/auth
+
+posthog:
+  ingress:
+    enabled: true
+    host: product.visio-preprod.beta.numerique.gouv.fr
+    annotations:
+      kubernetes.io/ingress.class: nginx
+      nginx.ingress.kubernetes.io/upstream-vhost: eu.i.posthog.com
+      nginx.ingress.kubernetes.io/backend-protocol: https

src/helm/env.d/production/values.meet.yaml.gotmpl

@@ -126,3 +126,12 @@ ingressAdmin:
     cert-manager.io/cluster-issuer: letsencrypt
     nginx.ingress.kubernetes.io/auth-signin: https://oauth2-proxy.beta.numerique.gouv.fr/oauth2/start
     nginx.ingress.kubernetes.io/auth-url: https://oauth2-proxy.beta.numerique.gouv.fr/oauth2/auth
+
+posthog:
+  ingress:
+    enabled: true
+    host: product.visio.numerique.gouv.fr
+    annotations:
+      kubernetes.io/ingress.class: nginx
+      nginx.ingress.kubernetes.io/upstream-vhost: eu.i.posthog.com
+      nginx.ingress.kubernetes.io/backend-protocol: https

src/helm/env.d/staging/values.meet.yaml.gotmpl

@@ -137,3 +137,12 @@ ingressAdmin:
       - secretName: transitional-tls
         hosts:
           - {{ .Values.newDomain }}
+
+posthog:
+  ingress:
+    enabled: true
+    host: product.visio-staging.beta.numerique.gouv.fr
+    annotations:
+      kubernetes.io/ingress.class: nginx
+      nginx.ingress.kubernetes.io/upstream-vhost: eu.i.posthog.com
+      nginx.ingress.kubernetes.io/backend-protocol: https