feat: deploy internal/external traefik routers (#119)

deploy traefik for internal and external applications. port forwarding
from the external routers will only occur to the IP of the
traefik-external service.

- traefik-internal and traefik-external added
- each is a different deployment

Reviewed-on: #119

apps/base/traefik-system/gatewayclass-external.yaml

@@ -0,0 +1,7 @@
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: traefik-external
+spec:
+  controllerName: traefik.io/gateway-controller-external

apps/base/traefik-system/gatewayclass-internal.yaml

@@ -0,0 +1,7 @@
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: traefik-internal
+spec:
+  controllerName: traefik.io/gateway-controller-internal

apps/base/traefik-system/kustomization.yaml

@@ -0,0 +1,8 @@
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - namespace.yaml
+  - gatewayclass-internal.yaml
+  - gatewayclass-external.yaml

apps/base/traefik-system/namespace.yaml

@@ -0,0 +1,5 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: traefik-system