added prometheus data export

flake.nix

@@ -0,0 +1,26 @@
+{
+  description = "A simple Rust project";
+
+  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+
+  outputs = { self, nixpkgs }: {
+
+    defaultPackage.x86_64-linux = with nixpkgs.legacyPackages.x86_64-linux; stdenv.mkDerivation {
+      name = "my-rust-project";
+      src = self;
+      
+      buildInputs = [
+        openssl
+        pkgconfig
+        rustc
+        cargo
+      ];
+      
+      shellHook = ''
+        export OPENSSL_DIR=${openssl.dev}
+        export OPENSSL_LIB_DIR=${openssl.out}/lib
+        export OPENSSL_INCLUDE_DIR=${openssl.dev}/include
+      '';
+    };
+  };
+}