Various typing and build fixes to enable CI

backend/package.json

@@ -20,7 +20,6 @@
   ],
   "main": "index.ts",
   "scripts": {
-    "ng": "./node_modules/@angular/cli/bin/ng",
     "tsc": "./node_modules/typescript/bin/tsc",
     "build": "npm run tsc",
     "start": "node --max-old-space-size=2048 dist/index.js",
@@ -29,6 +28,7 @@
   },
   "dependencies": {
     "@mempool/electrum-client": "^1.1.7",
+    "@types/node": "^16.11.41",
     "axios": "~0.27.2",
     "bitcoinjs-lib": "6.0.1",
     "crypto-js": "^4.0.0",
@@ -41,8 +41,8 @@
   },
   "devDependencies": {
     "@types/compression": "^1.7.2",
-    "@types/ws": "~8.5.3",
     "@types/express": "^4.17.13",
+    "@types/ws": "~8.5.3",
     "tslint": "^6.1.0"
   }
 }