Updated backend

- Added better anti DoS protection
- Added better security measures (HTTP headers, etc.)
- Added TLS support
- Added support for configurable rate limiting
- Added default 404 and error handling
- Updated proxy settings
- Updated env naming

.env.sample

@@ -1,11 +1,22 @@
-PORT=3000
+PORT=80
 DOMAIN="http://localhost:3000"
 DATABASE_HOST="127.0.0.1"
 DATABASE_NAME=hsp_gdh
 DATABASE_USER=hsp_gdh
 DATABASE_PASSWORD=""
 JWT_SECRET=""
-SMTP=
-MAIL=
-MAIL_PASS=
+MAIL_SERVER=
+MAIL_ADDRESS=
+MAIL_PASSWORD=
+BEHIND_PROXY=false
 DISABLE_EMAIL_VERIFICATION=true
+DISABLE_2_FACTOR_AUTHENTICATION=true
+DISABLE_ANTI_DOS=true
+DISABLE_ANTI_SPAM=true
+RATE_LIMIT_REQUESTS=100
+RATE_LIMIT_LOGIN_ATTEMPTS=5
+RATE_LIMIT_VERIFICATION_REQUESTS=5
+ENABLE_HTTPS=false
+HTTPS_PORT=443
+HTTPS_KEY=domain.key
+HTTPS_CERT=domain.crt