Add nix build to the template

.gitignore

@@ -92,3 +92,5 @@ tsconfig.tsbuildinfo
 # Generated files
 .docusaurus
 .cache-loader
+
+**/result

hello-go/flake.nix

@@ -0,0 +1,50 @@
+# flake.nix
+
+{
+  description = "Hello, World! server in Go";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachSystem [
+      "x86_64-linux"
+      "aarch64-darwin"
+      "aarch64-linux"
+    ] (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        pname = "hello";
+        src = ./.;
+
+        goPackage = pkgs.buildGoModule {
+          inherit pname src;
+          version = "0.0.1";
+          vendorHash = null;
+          nativeBuildInputs = [ pkgs.stdenv ];
+          CGO_ENABLED = 0;
+        };
+
+        containerImage = let
+          content = goPackage.overrideAttrs (old:
+            old // {
+              GOOS = "linux";
+              GOARCH = "arm64";
+              doCheck = false;
+            });
+        in pkgs.dockerTools.buildImage {
+          name = "hello-world-server";
+          tag = "latest";
+          config.Cmd = if system == "aarch64-linux" then
+            [ "${content}/bin/${pname}" ]
+          else
+            [ "${content}/bin/linux_arm64/${pname}" ];
+        };
+
+      in {
+        defaultPackage = goPackage;
+        packages.containerImage = containerImage;
+      });
+}

hello-go/go.mod

@@ -0,0 +1,3 @@
+module example.com/hello
+
+go 1.20

hello-go/main.go

@@ -0,0 +1,17 @@
+// main.go
+package main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello, World!")
+}
+
+func main() {
+	println("Starting hello server!")
+	http.HandleFunc("/", handler)
+	http.ListenAndServe(":8080", nil)
+}

main.star

@@ -21,3 +21,13 @@ def run(plan, name = "John Snow"):
     lib.run_hello(plan, config_json)
 
     postgres.run(plan)
+
+    plan.add_service(
+        name = "go-nix",
+        config = ServiceConfig(
+            image = NixBuildSpec(image_name = "hello-world-server", flake_output = "containerImage", flake_location_dir = "./hello-go", build_context_dir = "./"),
+            env_vars = {
+                "DEPENDENCY_URL": "http://{}:{}".format("some.url", "8888"),
+            },
+        ),
+    )