added some simple instructions to package.json

package.json

@@ -1,4 +1,25 @@
 {
+  "//" : [
+    "--------",
+    "Build Instructions:",
+    "--------",
+    "1. npm install",
+    "2. npm run build",
+    "",
+    "All done!  The project is now available in the dist/ folder.",
+    "",
+    "--------",
+    "Development Instructions (no webserver needed!):",
+    "--------",
+    "1. npm install",
+    "2. npm run build",
+    "3. npm run webserver &",
+    "4. npm run build:watch",
+    "",
+    "Open your web browser of choice and visit http://localhost.  #1 and #2 builds the project to the dist folder.",
+    "#3 runs a local web server in background.  #4 watches for changes to any files in the assets folder and if a",
+    "change is detected, the build task is executed immediately so the results are visible your browser."
+  ],
   "name": "witcher3map",
   "version": "2.0.0",
   "description": "Unofficial Witcher 3 interactive maps, with a mobile & tablet friendly design faithful to the game.",