fix: support uppercase letters in entrypoint names

Traefik supports entrypoints with uppercase letters (e.g. webSecure),
but helm generated manifest fails to apply because port names can only be lowercase.

This forces lower case on port names for entrypoints.

traefik/templates/_podtemplate.tpl

@@ -108,7 +108,7 @@
               {{- fail "ERROR: All hostPort must match their respective containerPort when `hostNetwork` is enabled" }}
             {{- end }}
           {{- end }}
-        - name: {{ $name | quote }}
+        - name: {{ $name | lower | quote }}
           containerPort: {{ default $config.port $config.containerPort }}
           {{- if $config.hostPort }}
           hostPort: {{ $config.hostPort }}

traefik/tests/ports-config_test.yaml

@@ -357,3 +357,16 @@ tests:
     asserts:
       - failedTemplate:
           errorMessage: "ERROR: Cannot create ssh port on Service without .port or .exposedPort"
+  - it: should support uppercase letters in entrypoint names
+    set:
+      ports:
+        UPPERCASE:
+          port: 443
+    asserts:
+      - contains:
+          path: spec.template.spec.containers[0].ports
+          content:
+            name: uppercase
+            containerPort: 443
+            protocol: TCP
+        template: deployment.yaml