Added command line options parsing and possibility to override config

Program.cs

@@ -1,6 +1,9 @@
 using IniParser;
 using NLog;
 using System.Collections.Generic;
+using System.CommandLine;
+using System.CommandLine.Invocation;
+using System.Globalization;
 using System.IO;
 using System.Reflection;
 using System.Threading;
@@ -16,16 +19,33 @@ namespace Barsik
 
 		static void Main(string[] args)
         {
-			Logging.Setup();
-			logger.Info("Barsik monitoring service starting");
+            CultureInfo.CurrentCulture = new CultureInfo("en-US");
+            var rootCommand = new RootCommand();
+            var runCommand = new Command("run")
+            {
+                new Option<string>("--config", () => "", "Path to configuration file")
+            };
+            runCommand.Handler = CommandHandler.Create<string>(RunService);
+            rootCommand.AddCommand(runCommand);
+            rootCommand.InvokeAsync(args).Wait();
+        }
 
-			registers = new RegistersContainer();
-			var server = new ModbusServer(registers);
+        static void RunService(string configPath)
+		{
+            Logging.Setup();
+            logger.Info("Barsik monitoring service starting");
+
+            registers = new RegistersContainer();
+            var server = new ModbusServer(registers);
             units = new List<BaseMonitoringUnit>();
 
             var configParser = new FileIniDataParser();
-			string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
-			var data = configParser.ReadFile(Path.Combine(assemblyFolder, "barsik.ini"));
+            if (string.IsNullOrEmpty(configPath))
+            {
+                string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+                configPath = Path.Combine(assemblyFolder, "barsik.ini");
+            }
+            var data = configParser.ReadFile(configPath);
             foreach (var section in data.Sections)
             {
                 if (section.SectionName.StartsWith("Unit"))
@@ -39,10 +59,10 @@ namespace Barsik
                     }
                 }
             }
-			logger.Info("Configuration loaded, we have " + units.Count + " units");
-			server.Port = int.Parse(data["Server"]["Port"]);
+            logger.Info("Configuration loaded, we have " + units.Count + " units");
+            server.Port = int.Parse(data["Server"]["Port"]);
             server.Run();
-			logger.Info("Exiting");
-		}
+            logger.Info("Exiting");
+        }
     }
 }