add dependecies to nix flake needed for building gems

Author: hanneskt

flake.nix

@@ -17,10 +17,17 @@
 
           buildInputs = with pkgs; [
             ruby_3_4 
-
             nodejs_24
+            foreman
+
             sqlite
 
+            # for mysql2 gem
+            libmysqlclient
+
+            # for psych gem
+            libyaml
+
             # Other dependencies
             imagemagick
           ];