From 0c9226aa727cb803a158c9d5c0831ebef73031bc Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Mon, 3 Jun 2024 17:20:02 +0900
Subject: [PATCH] Run useradd if ubuntu user is not available

---
 Dockerfile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 2406a29..7b145b8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -119,7 +119,9 @@ RUN set -ex && \
     apt-get clean && rm -r /var/lib/apt/lists/*
 
 RUN set -ex && \
-    useradd -ms /bin/bash ubuntu
+    if ! (id ubuntu &>/dev/null); then \
+        useradd -ms /bin/bash ubuntu; \
+    fi
 
 RUN mkdir -p /usr/local/etc