host now defaults to "localhost"

loglevel flag now uses logrus constants (0 up to 6)

config values are only applied if the corresponding flag wasn't passed
isFlagPassed() added to util.go

util.go

@@ -1,5 +1,7 @@
 package main
 
+import "flag"
+
 // indexOf returns the index of an element in an array
 func indexOf[T comparable](collection []T, e T) int {
 	for i, x := range collection {
@@ -9,3 +11,13 @@ func indexOf[T comparable](collection []T, e T) int {
 	}
 	return -1
 }
+
+func isFlagPassed(name string) bool {
+	found := false
+	flag.Visit(func(f *flag.Flag) {
+		if f.Name == name {
+			found = true
+		}
+	})
+	return found
+}