Update Dockerfile

Author: tsusdere

Dockerfile

@@ -1,14 +1,11 @@
 ARG RUBY_VERSION
 FROM ruby:$RUBY_VERSION-slim
 RUN set -ex \
-  && gem update --system --silent --quiet \
-  && apt-get update -y \
-  && apt-get upgrade -y \
-  && apt-get install -y \
-    build-essential \
-    git \
-    libcurl4-openssl-dev \
-  && apt-get clean
+    && gem update --system \
+    && apt-get update -y \
+    && apt-get upgrade -y \
+    && apt-get install -y build-essential git libcurl4-openssl-dev \
+    && apt-get clean
 WORKDIR /app/github-pages-health-check
 COPY Gemfile .
 COPY github-pages-health-check.gemspec .