Switch from yarn to npm

Makefile

@@ -115,9 +115,9 @@ dist: buildjs
 	tar -chzvf $(DIST_DIR)/shinylive-$(SHINYLIVE_VERSION).tar.gz shinylive-$(SHINYLIVE_VERSION)
 	rm shinylive-$(SHINYLIVE_VERSION)
 
-## Install node modules using yarn
+## Install node modules
 node_modules: package.json
-	yarn
+	npm ci
 
 $(BUILD_DIR)/shinylive/style-resets.css: src/style-resets.css
 	mkdir -p $(BUILD_DIR)/shinylive
@@ -343,4 +343,4 @@ distclean: clean
 
 ## Run tests
 test:
-	yarn playwright test
+	npm run playwright test

README.md

@@ -12,8 +12,7 @@ Code for deploying Shiny applications that will run completely in the browser, u
 
 ## Prerequisites
 
-`Shinylive` uses `yarn` for dependency management. If running `yarn --version` on the machine throws `command not found` error, install `yarn` on the machine by following the yarn installation documentation [here](https://classic.yarnpkg.com/lang/en/docs/install).
-
+Building Shinylive requires NodeJS.
 
 ## Build instructions
 
@@ -77,7 +76,7 @@ submodules             Update git submodules to commits referenced in this repos
 submodules-pull        Pull latest changes in git submodules
 all                    Build everything _except_ the shinylive.tar.gz distribution file
 dist                   Build shinylive distribution .tar.gz file
-node_modules           Install node modules using yarn
+node_modules           Install node modules
 pyodide_packages_local Copy local package wheels to the pyodide directory
 buildjs                Build JS resources from src/ dir
 buildjs-prod           Build JS resources for production (with minification)

flake.nix

@@ -26,7 +26,6 @@
 
           nativeBuildInputs = with pkgs; [
             nodejs_20
-            nodePackages.yarn
             python311
             (with python311Packages; [ pip virtualenv ])
             curl