Implemented the emailing service

Server/package-lock.json

@@ -9,6 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
+        "@sendgrid/mail": "^8.1.3",
         "bcrypt": "^5.1.1",
         "cors": "^2.8.5",
         "dotenv": "^16.4.5",
@@ -96,6 +97,41 @@
         "sparse-bitfield": "^3.0.3"
       }
     },
+    "node_modules/@sendgrid/client": {
+      "version": "8.1.3",
+      "resolved": "https://registry.npmjs.org/@sendgrid/client/-/client-8.1.3.tgz",
+      "integrity": "sha512-mRwTticRZIdUTsnyzvlK6dMu3jni9ci9J+dW/6fMMFpGRAJdCJlivFVYQvqk8kRS3RnFzS7sf6BSmhLl1ldDhA==",
+      "dependencies": {
+        "@sendgrid/helpers": "^8.0.0",
+        "axios": "^1.6.8"
+      },
+      "engines": {
+        "node": ">=12.*"
+      }
+    },
+    "node_modules/@sendgrid/helpers": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/@sendgrid/helpers/-/helpers-8.0.0.tgz",
+      "integrity": "sha512-Ze7WuW2Xzy5GT5WRx+yEv89fsg/pgy3T1E3FS0QEx0/VvRmigMZ5qyVGhJz4SxomegDkzXv/i0aFPpHKN8qdAA==",
+      "dependencies": {
+        "deepmerge": "^4.2.2"
+      },
+      "engines": {
+        "node": ">= 12.0.0"
+      }
+    },
+    "node_modules/@sendgrid/mail": {
+      "version": "8.1.3",
+      "resolved": "https://registry.npmjs.org/@sendgrid/mail/-/mail-8.1.3.tgz",
+      "integrity": "sha512-Wg5iKSUOER83/cfY6rbPa+o3ChnYzWwv1OcsR8gCV8SKi+sUPIMroildimlnb72DBkQxcbylxng1W7f0RIX7MQ==",
+      "dependencies": {
+        "@sendgrid/client": "^8.1.3",
+        "@sendgrid/helpers": "^8.0.0"
+      },
+      "engines": {
+        "node": ">=12.*"
+      }
+    },
     "node_modules/@sideway/address": {
       "version": "4.1.5",
       "resolved": "https://registry.npmjs.org/@sideway/address/-/address-4.1.5.tgz",
@@ -229,6 +265,21 @@
       "resolved": "https://registry.npmjs.org/async/-/async-3.2.5.tgz",
       "integrity": "sha512-baNZyqaaLhyLVKm/DlvdW051MSgO6b8eVfIezl9E5PqWxFgzLm/wQntEW4zOytVburDEr0JlALEpdOFwvErLsg=="
     },
+    "node_modules/asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q=="
+    },
+    "node_modules/axios": {
+      "version": "1.7.2",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.7.2.tgz",
+      "integrity": "sha512-2A8QhOMrbomlDuiLeK9XibIBzuHeRcqqNOHp0Cyp5EoJ1IFDh+XZH3A6BkXtv0K4gFGCI0Y4BM7B1wOEi0Rmgw==",
+      "dependencies": {
+        "follow-redirects": "^1.15.6",
+        "form-data": "^4.0.0",
+        "proxy-from-env": "^1.1.0"
+      }
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -422,6 +473,17 @@
         "text-hex": "1.0.x"
       }
     },
+    "node_modules/combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "dependencies": {
+        "delayed-stream": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -484,6 +546,14 @@
         "ms": "2.0.0"
       }
     },
+    "node_modules/deepmerge": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.3.1.tgz",
+      "integrity": "sha512-3sUqbMEc77XqpdNO7FRyRog+eW3ph+GYCbj+rK+uYyRMuwsVy0rMiVtPn+QJlKFvWP/1PYpapqYn0Me2knFn+A==",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/define-data-property": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/define-data-property/-/define-data-property-1.1.4.tgz",
@@ -500,6 +570,14 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/delegates": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
@@ -689,6 +767,38 @@
       "resolved": "https://registry.npmjs.org/fn.name/-/fn.name-1.1.0.tgz",
       "integrity": "sha512-GRnmB5gPyJpAhTQdSZTSp9uaPSvl09KoYcMQtsB9rQoOmzs9dH6ffeccH+Z+cv6P68Hu5bC6JjRh4Ah/mHSNRw=="
     },
+    "node_modules/follow-redirects": {
+      "version": "1.15.6",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.6.tgz",
+      "integrity": "sha512-wWN62YITEaOpSK584EZXJafH1AGpO8RVgElfkuXbTOrPX4fIfOyEpW/CsiNd8JdYrAoOvafRTOEnvsO++qCqFA==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://github.com/sponsors/RubenVerborgh"
+        }
+      ],
+      "engines": {
+        "node": ">=4.0"
+      },
+      "peerDependenciesMeta": {
+        "debug": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/form-data": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.0.tgz",
+      "integrity": "sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -1703,6 +1813,11 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg=="
+    },
     "node_modules/pstree.remy": {
       "version": "1.1.8",
       "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz",