feat: warn when incorrect interface/port in use for web processes

Users that misconfigure their process's listening interface or port will now see an additional healthcheck warning for web deploys. While only a single port is checked, this ensures that users at least have some context as to why their app isn't responding as expected.

Closes #4798

docker/usr/local/bin/docker-container-healthchecker

@@ -1,20 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail
-[[ $TRACE ]] && set -x
-
-main() {
-  declare desc="re-runs docker-container-healthchecker commands as sudo"
-  local DOCKER_CONTAINER_HEALTHCHECKER_BIN=""
-  if [[ -x "/usr/bin/docker-container-healthchecker" ]]; then
-    DOCKER_CONTAINER_HEALTHCHECKER_BIN="/usr/bin/docker-container-healthchecker"
-  fi
-
-  if [[ -z "$DOCKER_CONTAINER_HEALTHCHECKER_BIN" ]]; then
-    echo "!   No docker-container-healthchecker binary found" 1>&2
-    exit 1
-  fi
-
-  sudo -E "$DOCKER_CONTAINER_HEALTHCHECKER_BIN" "$@"
-}
-
-main "$@"