Handle config as struct with values from ENV file

structures/structures.go

@@ -20,3 +20,11 @@ type ProxyServer struct {
 	Type    string
 	Address string
 }
+
+type ClientConfig struct {
+	ConnectionsCount     int
+	ConnectionTimeout    int // In seconds
+	WorkerServerAddress  string
+	RequestMessagePrefix string
+	ProxyListBaseURL     string
+}