Rejig node install

Dockerfile

@@ -9,69 +9,18 @@ ARG YARN_VERSION
 ARG PATH="/app/node_modules/.bin:${PATH}"
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
-RUN adduser node && \
-    mkdir ~/.gnupg && \
-    echo "disable-ipv6" >> ~/.gnupg/dirmngr.conf && \
-    apt-get -qq update && \
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.3/install.sh | bash
+RUN nvm list
+RUN nvm install ${NODE_VERSION} && \
+    nvm use ${NODE_VERSION} \
+RUN apt-get -qq update && \
     apt-get -yqq install --no-install-recommends \
-        lsb-core \
-        gnupg \
-    && \
-    \
-    ARCH= && \
-    dpkgArch="$(dpkg --print-architecture)" && \
-    case "${dpkgArch##*-}" in \
-    amd64) ARCH='x64';; \
-    ppc64el) ARCH='ppc64le';; \
-    s390x) ARCH='s390x';; \
-    arm64) ARCH='arm64';; \
-    armhf) ARCH='armv7l';; \
-    i386) ARCH='x86';; \
-    *) echo "unsupported architecture"; exit 1 ;; \
-  esac \
-  # gpg keys listed at https://github.com/nodejs/node#release-keys
-  && set -ex \
-  && for key in \
-  4ED778F539E3634C779C87C6D7062848A1AB005C \
-  94AE36675C464D64BAFA68DD7434390BDBE9B9C5 \
-  74F12602B6F1C4E913FAA37AD3A89613643B6201 \
-  71DCFD284A79C3B38668286BC97EC7A07EDE3FC1 \
-  8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 \
-  C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
-  C82FA3AE1CBEDC6BE46B9360C43CEC45C17AB93C \
-  DD8F2338BAE7501E3DD5AC78C273792F7D83545D \
-  A48C2BEE680E841632CD4E44F07496B3EB3C1762 \
-  108F52B48DB57BB0CC439B2997B01419BD92F80A \
-  B9E2F5981AA6E0CD28160D9FF13993A75599653C \
-  ; do \
-    gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || \
-    gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; \
-  done \
-  && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-$ARCH.tar.xz" \
-  && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
-  && gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc \
-  && grep " node-v$NODE_VERSION-linux-$ARCH.tar.xz\$" SHASUMS256.txt | sha256sum -c - \
-  && tar -xJf "node-v$NODE_VERSION-linux-$ARCH.tar.xz" -C /usr/local --strip-components=1 --no-same-owner \
-  && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
-  && ln -s /usr/local/bin/node /usr/local/bin/nodejs \
-  && set -ex \
-  && for key in \
-    6A010C5166006599AA17F08146C2130DFD2497F5 \
-  ; do \
-    gpg --batch --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://ipv4.pool.sks-keyservers.net --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
-  done \
-  && curl -fsSLO --compressed "https://github.com/yarnpkg/yarn/releases/download/v$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz" \
-  && mkdir -p /opt \
-  && tar -xzf yarn-v$YARN_VERSION.tar.gz -C /opt/ \
-  && ln -s /opt/yarn-v$YARN_VERSION/bin/yarn /usr/local/bin/yarn \
-  && ln -s /opt/yarn-v$YARN_VERSION/bin/yarnpkg /usr/local/bin/yarnpkg \
-  && rm yarn-v$YARN_VERSION.tar.gz \
-  \
-  && apt-get autoremove -y \
-  && apt-get clean \
-  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/lib/dpkg/status.old /var/cache/debconf/templates.dat /var/log/dpkg.log /var/log/lastlog /var/log/apt/*.log
+        npm \
+        && \
+    apt-get autoremove -y && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/lib/dpkg/status.old /var/cache/debconf/templates.dat /var/log/dpkg.log /var/log/lastlog /var/log/apt/*.log
+RUN npm install -g yarn@${YARN_VERSION}
 
 # Healthcheck is nonsensical for this container.
 HEALTHCHECK NONE