feat(container)!: Update image app-template to v3 (#1370)

* feat(container)!: Update image app-template to v3

* Update helmrelease.yaml.j2

* Update helmrelease.yaml.j2

* Update helmrelease.yaml.j2

* Update README.md

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Devin Buhl <onedr0p@users.noreply.github.com>

bootstrap/templates/kubernetes/apps/network/echo-server/app/helmrelease.yaml.j2

@@ -8,7 +8,7 @@ spec:
   chart:
     spec:
       chart: app-template
-      version: 2.6.0
+      version: 3.0.3
       sourceRef:
         kind: HelmRepository
         name: bjw-s
@@ -22,10 +22,10 @@ spec:
       retries: 3
   values:
     controllers:
-      main:
+      echo-server:
         strategy: RollingUpdate
         containers:
-          main:
+          app:
             image:
               repository: ghcr.io/mendhak/http-https-echo
               tag: 31
@@ -47,8 +47,6 @@ spec:
                   timeoutSeconds: 1
                   failureThreshold: 3
               readiness: *probes
-              startup:
-                enabled: false
             securityContext:
               allowPrivilegeEscalation: false
               readOnlyRootFilesystem: true
@@ -66,34 +64,27 @@ spec:
             runAsGroup: 65534
             runAsNonRoot: true
     service:
-      main:
+      app:
+        controller: echo-server
         ports:
           http:
             port: *port
     serviceMonitor:
-      main:
-        enabled: true
+      app:
+        serviceName: echo-server
+        endpoints:
+          - port: http
+            scheme: http
+            path: /metrics
+            interval: 1m
+            scrapeTimeout: 10s
     ingress:
-      main:
-        enabled: true
+      app:
         className: external
         annotations:
           external-dns.alpha.kubernetes.io/target: "external.${SECRET_DOMAIN}"
         hosts:
-          - host: &host "{{ .Release.Name }}-external.${SECRET_DOMAIN}"
-            paths:
-              - path: /
-                service:
-                  name: main
-                  port: http
-        tls:
-          - hosts:
-              - *host
-      internal:
-        enabled: true
-        className: internal
-        hosts:
-          - host: &host "{{ .Release.Name }}-internal.${SECRET_DOMAIN}"
+          - host: &host "{{ .Release.Name }}.${SECRET_DOMAIN}"
             paths:
               - path: /
                 service: