feat: create mymx service

services/mymx/flake.nix

@@ -0,0 +1,40 @@
+{
+  description = "MyMX webhook receiver service";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs = { self, nixpkgs, rust-overlay, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [ rust-overlay.overlays.default ];
+      };
+      rustToolchain = pkgs.rust-bin.nightly.latest.default;
+    in
+    {
+      packages.${system}.default = pkgs.rustPlatform.buildRustPackage {
+        pname = "mymx-server";
+        version = "0.1.0";
+        src = ./.;
+        cargoLock.lockFile = ./Cargo.lock;
+        nativeBuildInputs = [ pkgs.pkg-config ];
+        buildInputs = [ pkgs.openssl ];
+        env.SQLX_OFFLINE = "true";
+      };
+
+      devShells.${system}.default = pkgs.mkShell {
+        buildInputs = [
+          rustToolchain
+          pkgs.postgresql
+          pkgs.pkg-config
+          pkgs.openssl
+          pkgs.sqlx-cli
+        ];
+      };
+    };
+}