diff --git a/Dockerfile b/Dockerfile
index 9378fdc..8a0a9fb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,13 +16,12 @@ RUN apt-get update && apt-get install -y \
   && rm -rf /var/lib/apt/lists/*
 
 RUN if [ "$build_type" = "All" ]; then \
-  apt-get update && apt-get install -y \
-  openssh-server \
+  apt-get install -y openssh-server \
   && rm -rf /var/lib/apt/lists/* \
-  && mkdir -p /var/run/sshd; \
+  && mkdir -p /var/run/sshd \
   && echo "mkdir -p /root/.ssh && ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa" >> /workspace/env_script.sh \
   && echo "cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys" >> /workspace/env_script.sh \
-  && echo "service ssh start" >> /workspace/env_script.sh; \
+  && echo "service ssh start" >> /workspace/env_script.sh \
   fi
 
 # Install PostgreSQL and MySQL
@@ -77,5 +76,6 @@ RUN if [ "$build_type" = "All" ]; then \
 CMD ["/bin/bash", "-c", ". /workspace/env_script.sh && /bin/bash"]
 
 # Example:
-# docker rm gart0; docker image rm gart; docker build -t gart .
+# docker rm gart0; docker image rm gart
+# docker build -t gart .
 # docker run -it --name gart0 gart