diff --git a/Dockerfile b/Dockerfile
index 89d3378..1ea7c01 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,14 +7,13 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     nodejs \
     && rm -rf /var/lib/apt/lists/*
 
-# .NET SDK + ASP.NET
-ENV DOTNET_CLI_TELEMETRY_OPTOUT=1
+# docker
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    dotnet-sdk-10.0 \
+    docker-cli \
     && rm -rf /var/lib/apt/lists/*
 
 # check
-RUN dotnet --version && \
+RUN docker --version && \
     node --version
 
 ENV DEBIAN_FRONTEND=