diff --git a/Dockerfile b/Dockerfile
index b7e4e27..744fe24 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,6 +21,8 @@ ENV PATH="/root/.cargo/bin:$PATH"
 RUN mkdir /app
 WORKDIR /app
 
+
 RUN mix local.hex --force
+RUN mix local.rebar --force
 
 CMD mix run --no-halt
diff --git a/docker-compose.yml b/docker-compose.yml
index 1c3a16d..67f0a59 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,5 +5,7 @@ services:
     env_file: docker.env
     volumes:
       - ".:/app"
+      # ignore build data
+      - "/app/_build"
     working_dir: "/app"
     restart: always