move to dotenv + custom env validations

ref #18

package.json

@@ -29,6 +29,7 @@
     "class-validator-jsonschema": "^2.0.3",
     "consola": "^2.15.0",
     "cors": "^2.8.5",
+    "dotenv": "^8.2.0",
     "express": "^4.17.1",
     "helmet": "^4.2.0",
     "jsonwebtoken": "^8.5.1",
@@ -45,14 +46,13 @@
   },
   "devDependencies": {
     "@types/cors": "^2.8.8",
-    "@types/dotenv-safe": "^8.1.1",
+    "@types/dotenv": "^8.2.0",
     "@types/express": "^4.17.9",
     "@types/jsonwebtoken": "^8.5.0",
     "@types/multer": "^1.4.4",
     "@types/node": "^14.14.9",
     "@types/swagger-ui-express": "^4.1.2",
     "@types/uuid": "^8.3.0",
-    "dotenv-safe": "^8.2.0",
     "nodemon": "^2.0.6",
     "sqlite3": "^5.0.0",
     "ts-node": "^9.0.0",