Bump dotenv from 10.0.0 to 15.0.0 (#131)

Bumps [dotenv](https://github.com/motdotla/dotenv) from 10.0.0 to 15.0.0.
- [Release notes](https://github.com/motdotla/dotenv/releases)
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v10.0.0...v15.0.0)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -7,7 +7,7 @@
     "start": "ts-node index.ts"
   },
   "dependencies": {
-    "dotenv": "^10.0.0",
+    "dotenv": "^15.0.0",
     "ejs": "~3.1.6",
     "express": "~4.17",
     "express-fileupload": "^1.2.1",