feat: send welcome emails through smtp

package-lock.json

@@ -14,6 +14,7 @@
         "fastify": "^5.3.2",
         "fastify-plugin": "^5.0.1",
         "lucide-react": "0.344.0",
+        "nodemailer": "^10.0.1",
         "pg": "^8.16.3",
         "react": "18.2.0",
         "react-dom": "18.2.0",
@@ -22,6 +23,7 @@
       },
       "devDependencies": {
         "@types/node": "^22.14.0",
+        "@types/nodemailer": "^8.0.1",
         "@types/pg": "^8.15.4",
         "@vitejs/plugin-react": "^5.0.0",
         "tsx": "^4.19.4",
@@ -1475,6 +1477,16 @@
         "undici-types": "~6.21.0"
       }
     },
+    "node_modules/@types/nodemailer": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/@types/nodemailer/-/nodemailer-8.0.1.tgz",
+      "integrity": "sha512-PxpaInm8V1JQDd4j0ds5HfvWQk8JupS1C0Picb96QJsrrRDjBH+DlK7L4ZdNSqNULhiZRQHc40nLVShaGxXAMw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/pg": {
       "version": "8.23.1",
       "resolved": "https://registry.npmjs.org/@types/pg/-/pg-8.23.1.tgz",
@@ -2231,6 +2243,15 @@
         "node": ">=18"
       }
     },
+    "node_modules/nodemailer": {
+      "version": "10.0.1",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-10.0.1.tgz",
+      "integrity": "sha512-c+gU9cL9HLDax3vjxL88kW+6NOgdtEUWaZ+AUtxdJR6LLhf0kGdCLExof7yiKW7zdO9EfXCSIgmhGyFmUM0mYQ==",
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
     "node_modules/obliterator": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/obliterator/-/obliterator-2.0.5.tgz",