Update 'README.md'

README.md

@@ -1,3 +1,23 @@
 # minesweeper
 
 Minesweeper game in C++ and GTK4
+
+## Instructions to build
+
+Install dependencies
+
+```
+sudo apt install libgtkmm-4.0-dev libsigc++-3.0-dev
+```
+
+Go to the project folder
+```
+cd minesweeper
+```
+
+Setup meson and compile the project
+
+```
+meson setup build
+meson compile -C build
+```