feat(dns): add DNS server with configurable port and IP via CLI

src/main/main_dns.cpp

@@ -0,0 +1,26 @@
+#include "dns_cli.hpp"
+#include "dns_server.hpp"
+#include "logger.hpp"
+
+int main(int argc, char *argv[])
+{
+    DnsCli cli;
+    cli.parse(argc, argv);
+
+    if (cli.isHelp()) {
+        cli.printHelp();
+        return 0;
+    }
+
+    Logger::init(true, "dns_server.log");
+    Logger::info(
+        "DNS server starting on port " + std::to_string(cli.getPort())
+        + ", answering with IP " + cli.getIp()
+    );
+
+    IoContext io;
+    DnsServer server(io, cli.getPort(), cli.getIp());
+    server.start();
+
+    io.run();
+}