fix: replace VM test with runCommand smoke test (no KVM in CI)

deploy-static-site/images/flake.nix

@@ -29,27 +29,27 @@
     {
       packages.${system}.staticServer = staticServer;
 
-      checks.${system}.smoke = pkgs.testers.nixosTest {
-        name = "static-server-smoke";
+      checks.${system}.smoke = pkgs.runCommand "static-server-smoke" {
+        nativeBuildInputs = with pkgs; [ static-web-server curl ];
+      } ''
+        mkdir -p $TMPDIR/www
+        printf index > $TMPDIR/www/index.html
+        printf foo   > $TMPDIR/www/foo.html
 
-        nodes.machine = { ... }: {
-          virtualisation.docker.enable = true;
-        };
+        static-web-server --port 18080 --root $TMPDIR/www &
+        SERVER_PID=$!
+        trap "kill $SERVER_PID" EXIT
 
-        testScript = ''
-          machine.start()
-          machine.wait_for_unit("docker.service")
-          machine.succeed("docker load < ${staticServer}")
-          machine.succeed(
-            "docker run -d --name site -p 8080:8080 static-server:latest"
-            " /bin/bash -c 'mkdir -p /var/www"
-            " && printf index > /var/www/index.html"
-            " && printf foo > /var/www/foo.html"
-            " && exec static-web-server --port 8080 --root /var/www'"
-          )
-          machine.wait_until_succeeds("curl -sf http://localhost:8080/")
-          machine.succeed("curl -sf http://localhost:8080/foo | grep -q foo")
-        '';
-      };
+        # wait for server to be ready
+        for i in $(seq 1 10); do
+          curl -sf http://localhost:18080/ && break
+          sleep 0.5
+        done
+
+        curl -sf http://localhost:18080/ | grep -q index
+        curl -sf http://localhost:18080/foo | grep -q foo
+
+        touch $out
+      '';
     };
 }