chore: start on flake

flake.nix

@@ -0,0 +1,62 @@
+{
+  description = "ConvertX";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        appSrc = ./.;
+
+        app = pkgs.dockerTools.buildLayeredImage {
+          name = "convertx";
+          tag = "latest";
+
+          contents = [
+            pkgs.bun
+            pkgs.resvg
+            pkgs.ffmpeg
+            pkgs.graphicsmagick
+            pkgs.ghostscript
+            pkgs.vips
+            pkgs.pandoc
+            pkgs.texlive.combined.scheme-full
+            pkgs.calibre
+            pkgs.inkscape
+            pkgs.poppler_utils
+            pkgs.assimp
+            pkgs.jxrlib
+            pkgs.libheif
+            pkgs.libjxl
+            pkgs.python3Packages.numpy
+          ];
+
+          config = {
+            Env = [
+              "NODE_ENV=production"
+              "PATH=/bin:/usr/bin"
+            ];
+            WorkingDir = "/app";
+            Cmd = [ "bun" "run" "./src/index.tsx" ];
+            ExposedPorts = {
+              "3000/tcp" = {};
+            };
+          };
+
+          extraCommands = ''
+            export PATH=${pkgs.bun}/bin:$PATH
+            mkdir -p app
+            cp -r ${appSrc}/* app/
+            cd app
+            bun install --frozen-lockfile --production
+            bun run build
+          '';
+        };
+      in {
+        packages.default = app;
+      });
+}