docs: add README.md

Author: lzhfe

backend/.gitignore

@@ -1 +1,2 @@
 node_modules
+npm-*

frontend/.gitignore

@@ -1,3 +1,2 @@
 node_modules
 .vscode
-.DS_Store

frontend/package.json

@@ -20,9 +20,9 @@
     "@angular/platform-browser": "4.3.1",
     "@angular/platform-browser-dynamic": "4.3.1",
     "@angular/router": "4.3.1",
-    "bootstrap": "^3.3.7",
-    "core-js": "^2.4.1",
-    "moment": "^2.18.1",
+    "bootstrap": "3.3.7",
+    "core-js": "2.4.1",
+    "moment": "2.18.1",
     "ngx-bootstrap": "1.8.0",
     "rxjs": "5.4.2",
     "zone.js": "0.8.14"
@@ -38,7 +38,7 @@
     "karma": "~1.4.1",
     "karma-chrome-launcher": "~2.0.0",
     "karma-cli": "~1.0.1",
-    "karma-coverage-istanbul-reporter": "^0.2.0",
+    "karma-coverage-istanbul-reporter": "0.2.0",
     "karma-jasmine": "~1.1.0",
     "karma-jasmine-html-reporter": "^0.2.2",
     "protractor": "~5.1.0",