diff --git a/Dockerfile b/Dockerfile
index 4b7a33a..fd4f0e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,15 @@
 FROM alpine
 
 RUN apk add --no-cache \
+  bash \
   coreutils \
   curl \
   git \
   gnupg \
+  make \
   openssh \
   socat \
+  tree \
   vim \
   zsh
 ENV LANG=en_US.UTF-8 LC_CTYPE=en_US.UTF-8