Double proxy (with mTLS encryption) This sandbox demonstrates a basic “double proxy” configuration, in which a simple aiohttp app connects to a PostgreSQL database, with two Envoy proxies in between. Envoy (front) -> aiohttp -> Envoy (postgres-front) -> Envoy (postgres-back) -> PostgreSQL This type of setup is common in a service mesh where Envoy acts as a “sidecar” between individual services. I