fix: mavwaked is a client binary, not a docker daemon

- Revert Dockerfile: no mavwaked build, no alsa-utils runtime dep
- Revert .dockerignore: no /mavwaked entry
- PROGRESS.md: deploy note says systemd user unit on a client box
  (desk PC, pi), connects to mavend over wg or local net — never on
  the homesrv or in docker

.dockerignore

@@ -13,7 +13,6 @@ certs
 /mavpoll
 /mavcaldav
 /mavenclient
-/mavwaked
 
 # heavy deps we don't need in context. We keep only the prebuilt runtime libs
 # (deps/lib, deps/piper) and the headers the CGO build needs.