Fix centos image for arm64

ci/image/Dockerfile

@@ -1,29 +1,23 @@
 FROM centos:7
 
-RUN yum update -y \
-  && yum install -y epel-release centos-release-scl \
-  && yum-config-manager --enable rhel-server-rhscl-7-rpms \
-  && yum update -y \
-  && yum install -y \
-    devtoolset-6 \
-    gcc-c++ \
-    xz \
-    ccache \
-    git \
-    wget \
-    openssl \
-    libxkbfile-devel \
-    libsecret-devel \
-    libx11-devel
+RUN yum update -y && yum install -y \
+  devtoolset-6 \
+  gcc-c++ \
+  xz \
+  ccache \
+  git \
+  wget \
+  openssl \
+  libxkbfile-devel \
+  libsecret-devel \
+  libx11-devel
 
 RUN mkdir /usr/share/node && cd /usr/share/node \
-  && curl https://nodejs.org/dist/v12.14.0/node-v12.14.0-linux-x64.tar.xz | tar xJ --strip-components=1 --
+  && curl "https://nodejs.org/dist/v12.14.0/node-v12.14.0-linux-$(uname -m | sed 's/86_//; s/aarch/arm/').tar.xz" | tar xJ --strip-components=1 --
 ENV PATH "$PATH:/usr/share/node/bin"
 RUN npm install -g yarn
 
-RUN curl -L https://github.com/mvdan/sh/releases/download/v3.0.1/shfmt_v3.0.1_linux_amd64 > /usr/local/bin/shfmt \
+RUN curl -L "https://github.com/mvdan/sh/releases/download/v3.0.1/shfmt_v3.0.1_linux_$(uname -m | sed 's/x86_/amd/; s/aarch64/arm/')" > /usr/local/bin/shfmt \
   && chmod +x /usr/local/bin/shfmt
 
-RUN echo 'source /opt/rh/devtoolset-6/enable' >> /root/.bashrc
-
 ENTRYPOINT ["/bin/bash", "-c"]