add npm info permission error

npm/npm-error-permission.txt

@@ -0,0 +1,21 @@
+Checkout this: https://stackoverflow.com/a/55274930
+
+	$ mkdir ~/.npm-global
+
+Configure npm to use the new directory path:
+
+	$ npm config set prefix '~/.npm-global'
+
+In your preferred text editor, open or create a
+
+	~/.profile
+
+file and add this line:
+
+	export PATH=~/.npm-global/bin:$PATH
+
+On the command line, update your system variables:
+
+	source ~/.profile
+
+