fix: remove sysctls from caddy - net.core.* not namespace-safe

net.core.rmem_max/wmem_max are not namespaced sysctls and cannot
be set in unprivileged containers. These values are already set
on the host via sysctl role (64MB) and inherited by containers.

compose.yaml

@@ -8,9 +8,6 @@ services:
     image: caddy
     container_name: caddy
     restart: unless-stopped
-    sysctls:
-      - net.core.rmem_max=67108864
-      - net.core.wmem_max=67108864
     extra_hosts:
       - "host.docker.internal:host-gateway"
     networks: