feat: TLS support for web (#301)

* Added TLS support for web

- Added optional configurations `cert_file` and `key_file` to run web server with https

Signed-off-by: Dmytro Bondar <git@bonddim.com>

* Helm chart update

- Refactored Ingress to use one host only (`config.web.external_url` is required)
- Added Certificate resource template (secret is mounted to container into `/app/certs/`)
- Added support for service with mixed protocols (exposes UI and Wireguard ports on same IP)
- Added helm-docs target to makefile
- Changed pod labels to use selectorLabels
- Removed default probes (app runs without healthy web)
- Removed sections from README

Signed-off-by: Dmytro Bondar <git@bonddim.com>

* Fix chart workflow path filter

* Fix chart lint issue

* Skip clean-up tested chart

* Try k3d cluster

---------

Signed-off-by: Dmytro Bondar <git@bonddim.com>

Makefile

@@ -127,4 +127,9 @@ build-docker:
 	docker build --progress=plain \
 	--build-arg BUILD_IDENTIFIER=${ENV_BUILD_IDENTIFIER} --build-arg BUILD_VERSION=${ENV_BUILD_VERSION} \
  	--build-arg TARGETPLATFORM=unknown . \
-	-t h44z/wg-portal:local
+	-t h44z/wg-portal:local
+
+#< helm-docs: Generate the helm chart documentation
+.PHONY: helm-docs
+helm-docs:
+	docker run --rm --volume "${PWD}/deploy:/helm-docs" -u "$$(id -u)" jnorwood/helm-docs -s file