Added a new read me (DEVELOPMENT.md) as starting point for new develope

Added a new VSC launch configuration to start the backend in the debugger
Update the build instruction in README.md (Issue #728)

.vscode/launch.json

@@ -4,6 +4,20 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+        {
+            "name": "Dev: Debug Backend",
+            "request": "launch",
+            "runtimeArgs": [
+                "run-script",
+                "debug"
+            ],
+            "runtimeExecutable": "npm",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "type": "node",
+            "cwd": "${workspaceFolder}/backend"
+        },
         {
             "type": "node",
             "request": "attach",