more info in readme, gitignore

.gitignore

@@ -0,0 +1,2 @@
+node_modules
+dist

README.md

@@ -1,7 +1,17 @@
 
+== To build ==
+
+  npm install
+  npm run build
+
+
+== How these files were created (tutorial) ==
+
+To go through the full process, rm the package.json and regenerate it with:
+
 	npm init -y
 
-Makes an empty [package.json](package.json) in this directory. When you install with npm install --save, the names of packages get added to "dependencies" in this file, so that later you can just "npm install" to reinstall all the dependencies (it's like pip + requirements.txt if that sounds familiar).
+This makes an empty [package.json](package.json) in this directory. When you install with npm install --save, the names of packages get added to "dependencies" in this file, so that later you can just "npm install" to reinstall all the dependencies (it's like pip + requirements.txt if that sounds familiar).
 
 First install three js with npm, following <https://threejs.org/docs/#manual/en/introduction/Installation>