feat: add nix package, module, and container

Signed-off-by: seth <getchoo@tuta.io>

nix/derivation.nix

@@ -0,0 +1,51 @@
+{
+  lib,
+  stdenv,
+  naersk,
+  CoreFoundation,
+  Security,
+  SystemConfiguration,
+  version,
+  optimizeSize ? false,
+}: let
+  filter = path: type: let
+    path' = toString path;
+    base = baseNameOf path';
+
+    dirBlocklist = ["nix"];
+
+    matches = lib.any (suffix: lib.hasSuffix suffix base) [".rs"];
+    isCargo = base == "Cargo.lock" || base == "Cargo.toml";
+    isAllowedDir = !(builtins.elem base dirBlocklist);
+  in
+    (type == "directory" && isAllowedDir) || matches || isCargo;
+
+  filterSource = src:
+    lib.cleanSourceWith {
+      src = lib.cleanSource src;
+      inherit filter;
+    };
+in
+  naersk.buildPackage {
+    pname = "refraction";
+    inherit version;
+
+    src = filterSource ../.;
+
+    buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
+      CoreFoundation
+      Security
+      SystemConfiguration
+    ];
+
+    RUSTFLAGS = lib.optionalString optimizeSize "-C codegen-units=1 -C strip=symbols -C opt-level=z";
+
+    meta = with lib; {
+      mainProgram = "refraction";
+      description = "Discord bot for Prism Launcher";
+      homepage = "https://github.com/PrismLauncher/refraction";
+      license = licenses.gpl3Plus;
+      platforms = with platforms; linux ++ darwin;
+      maintainers = with maintainers; [getchoo Scrumplex];
+    };
+  }