diff --git a/.gitignore b/.gitignore
index fdd5269..8b3072d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ node_modules
 *.pdf
 *.zip
 \.vagrant
+tmp*
diff --git a/Dockerfile b/Dockerfile
index bd82c71..401483a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,13 +1,10 @@
-FROM debian:jessie
+FROM node:buster-slim
 MAINTAINER Glenn ROLLAND <glenux@glenux.net>
 
-RUN mkdir -p /hop
-ADD slides /hop/slides
-ADD bin /hop/bin
-ADD themes /home/themes
-ADD Makefile /home/Makefile
 RUN apt-get update && \
-	apt-get install -y make 
-WORKDIR /hop
-RUN make install
-CMD make
+	apt-get install -y make
+
+COPY . /app
+WORKDIR /app
+RUN make prepare
+CMD make watch