diff --git a/.dockerignore b/.dockerignore
index e05914176..4a14bb0ed 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -24,6 +24,8 @@ Dockerfile
 
 settings.json
 src/node_modules
+bin/node_modules
+doc/node_modules
 admin/node_modules
 ui/node_modules
 node_modules
diff --git a/Dockerfile b/Dockerfile
index ea484ade5..0e6382d6a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,6 +11,7 @@ RUN wget https://github.com/SamTV12345/gnpm/releases/download/v0.1.0/gnpm_0.1.0_
 RUN tar -xvzf gnpm_0.1.0_linux_amd64.tar.gz
 RUN mv gnpm /usr/local/bin/
 ARG EP_DIR=/opt/etherpad-lite
+WORKDIR ${EP_DIR}
 COPY . .
 RUN gnpm install
 RUN gnpm run build:ui