Fix monorepo build

package.json

@@ -1,43 +1,22 @@
 {
   "name": "root",
   "private": true,
+  "workspaces": {
+    "packages": [
+      "frontend",
+      "shared",
+      "backend"
+    ],
+    "nohoist": [
+      "**"
+    ]
+  },
   "scripts": {
-    "build": "lerna run build-before && lerna run build",
-    "initialize": "lerna link && lerna run initialize",
+    "build": "yarn workspaces shared run build && yarn workspaces frontend run build && yarn workspaces backend run build",
     "lint": "eslint './**/src/**/*.{js,ts,json}' --fix",
-    "start": "lerna run --parallel start",
-    "try-build": "lerna run --parallel try-build-before && lerna run --parallel try-build"
-  },
-  "dependencies": {
-    "decla.red-frontend": "file:frontend",
-    "shared": "file:shared"
-  },
-  "devDependencies": {
-    "@types/cors": "^2.8.7",
-    "@types/express": "^4.17.8",
-    "@types/node": "^14.11.2",
-    "@types/socket.io": "^2.1.11",
-    "@types/socket.io-client": "^1.4.34",
-    "@types/uuid": "^8.0.0",
-    "@typescript-eslint/eslint-plugin": "^3.9.1",
-    "@typescript-eslint/parser": "^3.9.1",
-    "autoprefixer": "^9.8.5",
-    "css-loader": "^3.5.2",
-    "cssnano": "^4.1.10",
-    "eslint": "^7.2.0",
-    "eslint-config-prettier": "^6.11.0",
-    "eslint-plugin-import": "^2.21.2",
-    "eslint-plugin-json-format": "^2.0.1",
-    "eslint-plugin-prettier": "^3.1.4",
-    "eslint-plugin-unused-imports": "^0.1.3",
-    "file-loader": "^6.1.0",
-    "firebase": "^7.22.0",
-    "gl-matrix": "^3.3.0",
-    "lerna": "^3.22.1",
-    "prettier": "^2.0.5",
-    "sdf-2d": "^0.5.2",
-    "socket.io-client": "^2.3.1",
-    "typescript": "^4.0.3",
-    "uuid": "^8.2.0"
+    "frontend": "yarn workspace decla.red-frontend start",
+    "shared": "yarn workspace shared start",
+    "backend": "yarn workspace declared-server start",
+    "start": "concurrently --kill-others-on-fail \"yarn frontend\"  \"yarn shared\"  \"yarn backend\""
   }
 }