diff --git a/dev/.gitignore b/dev/.gitignore
index 1269488..f3d333e 100644
--- a/dev/.gitignore
+++ b/dev/.gitignore
@@ -1 +1,2 @@
 data
+ext
diff --git a/dev/start b/dev/start
index eabd482..69f345a 100755
--- a/dev/start
+++ b/dev/start
@@ -12,6 +12,9 @@ export $(cat ../.env | sed 's/#.*//g' | xargs)
 DATA_PATH="./data"
 mkdir -p "${DATA_PATH}"
 
+EXTERNAL_PATH="./ext"
+mkdir -p "${EXTERNAL_PATH}"
+
 docker run --rm -it \
     --name="neko_rooms_server" \
     -v "`realpath ..`:/app" \
@@ -21,6 +24,7 @@ docker run --rm -it \
 	-e "NEKO_ROOMS_NAT1TO1=${NEKO_ROOMS_NAT1TO1}" \
 	-e "NEKO_ROOMS_STORAGE_INTERNAL=/data" \
 	-e "NEKO_ROOMS_STORAGE_EXTERNAL=`realpath ${DATA_PATH}`" \
+	-e "NEKO_ROOMS_MOUNTS_WHITELIST=`realpath ${EXTERNAL_PATH}`" \
 	-e "NEKO_ROOMS_TRAEFIK_DOMAIN=${NEKO_ROOMS_TRAEFIK_DOMAIN}" \
 	-e "NEKO_ROOMS_TRAEFIK_ENTRYPOINT=${NEKO_ROOMS_TRAEFIK_ENTRYPOINT}" \
 	-e "NEKO_ROOMS_TRAEFIK_NETWORK=${NEKO_ROOMS_TRAEFIK_NETWORK}" \