feat: complete dockerization (optional)

docker.env.example

@@ -0,0 +1,13 @@
+PUBLIC_URL=https://cms.example.com
+JWT_SECRET=replace-with-output-of-openssl-rand-hex-32
+SMTP_HOST=smtp.example.com
+SMTP_PORT=465
+SMTP_LOGIN=noreply@example.com
+SMTP_PASSWORD=replace-me
+SMTP_SENDER=noreply@example.com
+
+ENVIRONMENT=production
+CORS_ALLOWED_ORIGINS=
+AUTH_RATE_LIMIT_MAX_ATTEMPTS=5
+AUTH_RATE_LIMIT_WINDOW_SECONDS=60
+TRUSTED_PROXIES=