fix: respect dashboard disabling properties in traefik

Closes #5855

plugins/traefik-vhosts/templates/compose.yml.sigil

@@ -24,7 +24,7 @@ services:
       {{ end }}
 
     labels:
-      {{ if $.TRAEFIK_API_ENABLED }}
+      {{ if eq $.TRAEFIK_API_ENABLED "true" }}
       # Dashboard
       - "traefik.http.routers.api.rule=Host(`{{ $.TRAEFIK_API_VHOST }}`)"
       - "traefik.http.routers.api.service=api@internal"

tests/unit/traefik.bats

@@ -7,6 +7,7 @@ setup() {
   dokku nginx:stop
   dokku traefik:set --global letsencrypt-server https://acme-staging-v02.api.letsencrypt.org/directory
   dokku traefik:set --global letsencrypt-email
+  dokku traefik:set --global api-enabled
   dokku traefik:start
   create_app
 }
@@ -84,6 +85,61 @@ teardown() {
   assert_output "python/http.server"
 }
 
+@test "(traefik) traefik:set api" {
+  run /bin/bash -c "dokku proxy:set $TEST_APP traefik"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "docker inspect traefik-traefik-1 --format '{{ index .Config.Labels \"traefik.http.routers.api.rule\" }}'"
+  echo "output: $output"
+  echo "status: $status"
+  assert_output_not_exists
+  assert_success
+
+  run /bin/bash -c "dokku traefik:set --global api-enabled false"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku traefik:stop"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku traefik:start"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "docker inspect traefik-traefik-1 --format '{{ index .Config.Labels \"traefik.http.routers.api.rule\" }}'"
+  echo "output: $output"
+  echo "status: $status"
+  assert_output_not_exists
+  assert_success
+
+  run /bin/bash -c "dokku traefik:set --global api-enabled true"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku traefik:stop"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku traefik:start"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "docker inspect traefik-traefik-1 --format '{{ index .Config.Labels \"traefik.http.routers.api.rule\" }}'"
+  echo "output: $output"
+  echo "status: $status"
+  assert_output "Host(\`traefik.dokku.me\`)"
+  assert_success
+}
+
 @test "(traefik) traefik:set priority" {
   run /bin/bash -c "dokku proxy:set $TEST_APP traefik"
   echo "output: $output"