Migrate integration-test infrastucture from Cypress to Selenium+Mocha (#170)

* cicd: Move cypress to selenium+mocha

* cicd: with is not supported unless using an a container

* cicd: relative path to mocha

* cicd: the integration-tests runner now starts/stops OliveTin

* cicd: Knowing the CWD helps debugging

* cicd: Headless chrome

* cicd: wait for integration-test server to be started

* fmt: Mostly fix isses from eslint

* cicd: #169 - Test multiple combo boxes

* fmt: let should be const

* cicd: Remove cypress entirely

internal/httpservers/webuiServer.go

@@ -25,6 +25,7 @@ type webUISettings struct {
 func findWebuiDir() string {
 	directoriesToSearch := []string{
 		cfg.WebUIDir,
+		"../webui/",
 		"/usr/share/OliveTin/webui/",
 		"/var/www/OliveTin/",
 		"/var/www/olivetin/",