implement docker stop timeout. closes #2126 (#2148)

plugins/apps/functions

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$PLUGIN_AVAILABLE_PATH/config/functions"
 
 apps_create() {
   declare desc="verifies app name and creates an app"
@@ -34,11 +35,14 @@ apps_destroy() {
 
   plugn trigger pre-delete "$APP" "$IMAGE_TAG"
   local DOKKU_APP_CIDS=$(get_app_container_ids "$APP")
-  local cid
+  local DOKKU_DOCKER_STOP_TIMEOUT="$(config_get "$APP" DOKKU_DOCKER_STOP_TIMEOUT || true)"
+  [[ $DOKKU_DOCKER_STOP_TIMEOUT ]] && DOCKER_STOP_TIME_ARG="--time=${DOKKU_DOCKER_STOP_TIMEOUT}"
 
   if [[ -n $DOKKU_APP_CIDS ]]; then
+    local cid
     for cid in $DOKKU_APP_CIDS; do
-      docker stop "$cid" > /dev/null || true
+      # shellcheck disable=SC2086
+      docker stop $DOCKER_STOP_TIME_ARG "$cid" > /dev/null || true
       docker rm "$cid"  > /dev/null || true
     done
   fi