make it easier to deploy tailwind css files

[mpscholten]

                packages.appStylesheet =
                    let
                        tailwind = with pkgs; (nodePackages.tailwindcss.overrideAttrs
                            (_: {
                                plugins = [
                                    nodePackages."@tailwindcss/aspect-ratio"
                                    nodePackages."@tailwindcss/forms"
                                    nodePackages."@tailwindcss/language-server"
                                    nodePackages."@tailwindcss/line-clamp"
                                    nodePackages."@tailwindcss/typography"
                                ];
                            })
                        );
                        filter = ihp.inputs.nix-filter.lib;
                    in pkgs.stdenv.mkDerivation {
                        name = "${config.ihp.appName}-appStyleshet";
                        src = filter {
                            root = ./tailwind;
                            include = [(filter.matchExt "css") (filter.matchExt "js")];
                            exclude = [];
                        };
                        nativeBuildInputs = [tailwind];
                        allowedReferences = [];
                        buildPhase = ''
                            ${tailwind}/bin/tailwindcss -c tailwind.config.js -i app.css -o $out
                        '';
                    };

                packages.optimized-prod-server-with-frontend = self.packages."${system}".optimized-prod-server.overrideAttrs (finalAttrs: previousAttrs: {
                        name = "${previousAttrs.name}-with-frontend";
                        nativeBuildInputs = previousAttrs.nativeBuildInputs ++ [ self.packages."${system}".frontend ];
                        preBuild = ''
                            mkdir -p static/Frontend
                            ln -s ${self.packages."${system}".frontend}/main.css static/Frontend/main.css
                        '';
                    });

services.ihp.package = self.packages."${pkgs.system}".optimized-prod-server-with-frontend;