Add DOCKER_DRONE_EXTRA_ARGS config parameter and try restart=false.

dev-util/drone/files/app.ini

@@ -30,5 +30,8 @@ DRONE_SERVER_PROTO="https"
 # DRONE_GIT_ALWAYS_AUTH=true
 
 # Required string value configures ports to publish for docker: space-separated
-# list of <hostport>:<containerport> tuples
+# list of <hostport>:<containerport> tuples.
 DOCKER_PUBLISH="8080:80 8443:443"
+
+# Optional string value of extra args passed verbatim to the docker command.
+DOCKER_DRONE_EXTRA_ARGS=""

dev-util/drone/files/drone.sh

@@ -18,10 +18,12 @@ for p in ${DOCKER_PUBLISH} ; do
 	docker_args="${docker_args} --publish=${p}"
 done
 
+docker_args="${docker_args} ${DOCKER_DRONE_EXTRA_ARGS}"
+
 docker run \
   --volume=/var/lib/drone:/data \
   ${docker_args} \
   --restart=always \
-  --detach=true \
+  --detach=false \
   --name=drone \
   drone/drone:<VERSION>