Stop bundling libraries in release

- Instead we now use CentOS 7 for the static build to guarantee
  that we only depend on libc v2.17

- For macOS we now pull in a static node binary and bundle that instead.

ci/container/centos/Dockerfile

@@ -0,0 +1,22 @@
+FROM centos:7
+
+RUN curl -sL https://rpm.nodesource.com/setup_14.x | bash - && \
+      yum install -y nodejs &&
+      npm install -g yarn
+
+RUN yum groupinstall -y 'Development Tools'
+RUN yum install -y python2 libsecret-devel libX11-devel libxkbfile-devel
+
+RUN npm config set python python2
+
+RUN yum install -y epel-release && yum install -y jq
+RUN yum install -y rsync
+
+# Copied from ../Dockerfile
+# Install Go dependencies
+RUN ARCH="$(uname -m | sed 's/x86_64/amd64/; s/aarch64/arm64/')" && \
+    curl -fsSL "https://dl.google.com/go/go1.14.3.linux-$ARCH.tar.gz" | tar -C /usr/local -xz
+ENV PATH=/usr/local/go/bin:/root/go/bin:$PATH
+ENV GO111MODULE=on
+RUN go get mvdan.cc/sh/v3/cmd/shfmt
+RUN go get github.com/goreleaser/nfpm/cmd/nfpm