Rename container and release-container to images and release-image

ci/images/centos:7/Dockerfile

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+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

ci/images/debian:8/Dockerfile

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+FROM debian:8
+
+RUN apt-get update
+
+# Needed for debian repositories added below.
+RUN apt-get install -y curl gnupg
+
+# Installs node.
+RUN curl -fsSL https://deb.nodesource.com/setup_14.x | bash - && \
+    apt-get install -y nodejs
+
+# Installs yarn.
+RUN curl -fsSL https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
+    apt-get update && apt-get install -y yarn
+
+# Installs VS Code build deps.
+RUN apt-get install -y build-essential \
+                   libsecret-1-dev \
+                   libx11-dev \
+                   libxkbfile-dev
+
+# Installs envsubst.
+RUN apt-get install -y gettext-base
+
+# Misc build dependencies.
+RUN apt-get install -y git rsync unzip
+
+# We need latest jq from debian buster for date support.
+RUN ARCH="$(dpkg --print-architecture)" && \
+    curl -fsSOL http://http.us.debian.org/debian/pool/main/libo/libonig/libonig5_6.9.1-1_$ARCH.deb && \
+    dpkg -i libonig*.deb && \
+    curl -fsSOL http://http.us.debian.org/debian/pool/main/j/jq/libjq1_1.5+dfsg-2+b1_$ARCH.deb && \
+    dpkg -i libjq*.deb && \
+    curl -fsSOL http://http.us.debian.org/debian/pool/main/j/jq/jq_1.5+dfsg-2+b1_$ARCH.deb && \
+    dpkg -i jq*.deb && rm *.deb
+
+# Installs shellcheck.
+# Unfortunately coredumps on debian:8 so disabled for now.
+#RUN curl -fsSL https://github.com/koalaman/shellcheck/releases/download/v0.7.1/shellcheck-v0.7.1.linux.$(uname -m).tar.xz | \
+#    tar -xJ && \
+#    mv shellcheck*/shellcheck /usr/local/bin && \
+#    rm -R shellcheck*
+
+# Install Go dependencies
+RUN ARCH="$(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
+
+RUN curl -fsSL https://get.docker.com | sh