diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..e69de29
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..0369c1a
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,7 @@
+FROM ubuntu:24.04
+WORKDIR /usr/local/app
+
+COPY main.cpp ./
+
+RUN apt-get update && apt-get install -y gcc g++
+RUN g++ main.cpp -o main
diff --git a/main.cpp b/main.cpp
index 7588360..27eb696 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,39 +1,39 @@
-//#include "fem/fem.hpp"
-//#include "flatset/flatset.hpp"
-//#include "filesystem/filesystem.hpp"
-//#include "yamlParser/yamlParser.hpp"
+// #include "fem/fem.hpp"
+#include "flatset/flatset.hpp"
+// #include "filesystem/filesystem.hpp"
+// #include "yamlParser/yamlParser.hpp"
 #include <iostream>
 
 int main(int argc, char *argv[])
 {
-  std::cout << "Let's fight with CMake, Docker, and some dependencies!" << std::endl << std::endl;
+  std::cout << "Let's fight with CMake, Docker, and some dependencies!" << std::endl
+            << std::endl;
 
-  //std::cout << "Solve Poisson problem with FEM using deal.II" << std::endl;
-  //Fem fem;
-  //fem.run();
-  //std::cout << std::endl;
+  // std::cout << "Solve Poisson problem with FEM using deal.II" << std::endl;
+  // Fem fem;
+  // fem.run();
+  // std::cout << std::endl;
 
-  //std::cout << "Modify a flat set using boost container" << std::endl;
-  //modifyAndPrintSets();
-  //std::cout << std::endl;
+  std::cout << "Modify a flat set using boost container" << std::endl;
+  modifyAndPrintSets();
+  std::cout << std::endl;
 
-  //std::cout << "Inspect the current directory using boost filesystem" << std::endl;
-  //inspectDirectory();
-  //std::cout << std::endl;
+  // std::cout << "Inspect the current directory using boost filesystem" << std::endl;
+  // inspectDirectory();
+  // std::cout << std::endl;
 
-  
-  //if ( argc == 2 )
+  // if ( argc == 2 )
   //{
-  //  const std::string yamlFile( argv[1] );
-  //  std::cout << "Parse some yaml file with yaml-cpp" << std::endl;
-  //  std::cout << "  " << yamlFile << std::endl;
-  //  parseConfig( yamlFile );
-  //}
-  //else
+  //   const std::string yamlFile( argv[1] );
+  //   std::cout << "Parse some yaml file with yaml-cpp" << std::endl;
+  //   std::cout << "  " << yamlFile << std::endl;
+  //   parseConfig( yamlFile );
+  // }
+  // else
   //{
-  //  std::cout << "To parse a yaml file please specify file on command line" << std::endl;
-  //  std::cout << "  ./main YAMLFILE" << std::endl;
-  //}
+  //   std::cout << "To parse a yaml file please specify file on command line" << std::endl;
+  //   std::cout << "  ./main YAMLFILE" << std::endl;
+  // }
 
   return 0;
 }