socket connection established and chess logic imported from old codebase

backend/package-lock.json

@@ -12,9 +12,11 @@
         "bcryptjs": "^2.4.3",
         "body-parser": "^1.20.2",
         "cors": "^2.8.5",
+        "dotenv": "^16.3.1",
         "express": "^4.18.2",
         "jsonwebtoken": "^8.5.1",
         "mongoose": "^7.2.1",
+        "nodemailer": "^6.9.3",
         "socket.io": "^4.6.1",
         "uuid": "^9.0.0"
       }
@@ -211,6 +213,17 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
+    "node_modules/dotenv": {
+      "version": "16.3.1",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.3.1.tgz",
+      "integrity": "sha512-IPzF4w4/Rd94bA9imS68tZBaYyBWSCE47V1RGuMrB94iyTOIEwRmVL2x/4An+6mETpLrKJ5hQkB8W4kFAadeIQ==",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/motdotla/dotenv?sponsor=1"
+      }
+    },
     "node_modules/ecdsa-sig-formatter": {
       "version": "1.0.11",
       "resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
@@ -774,6 +787,14 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/nodemailer": {
+      "version": "6.9.3",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.9.3.tgz",
+      "integrity": "sha512-fy9v3NgTzBngrMFkDsKEj0r02U7jm6XfC3b52eoNV+GCrGj+s8pt5OqhiJdWKuw51zCTdiNR/IUD1z33LIIGpg==",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",