add Nix flake

flake.nix

@@ -0,0 +1,37 @@
+{
+  description = "video-streaming-poc devShell";
+
+  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; };
+        in with pkgs;
+        let
+          opencv-custom = pkgs.opencv.override {
+            enableGtk3 = true;
+            #enableCuda = true;
+            enablePython = true;
+          };
+	in {
+          devShells.default = mkShell rec {
+            buildInputs = [
+              # Meson
+              meson
+              pkg-config
+              ninja
+
+              # Boost
+              boost
+
+              # OpenCV
+              opencv-custom
+            ];
+          };
+        }
+      );
+}