meteor: Use nodejs 14.18.3 and enable corepack (for yarn)

Dockerfile.meteor

 FROM debian:bullseye
 
+ENV NODEJS_VERSION=14.18.3
 ENV METEOR_VERSION=2.5.6
 ENV METEOR_ALLOW_SUPERUSER=true
 ENV PATH=$PATH:/root/.meteor
@@ -9,16 +10,11 @@ RUN apt-get -qq update && \
     apt-get -qq install lsb-release curl wget ca-certificates debhelper apt-utils libarchive-tools gnupg bzip2 g++ build-essential git python3 && \
     lsb_release -a && uname -a
 
-#COPY nodesource.gpg.key /etc/apt/trusted.gpg.d/nodesource-repo.asc
-#RUN echo 'deb https://deb.nodesource.com/node_14.x bullseye main' > /etc/apt/sources.list.d/nodesource-repo.list
-
-#RUN apt-get -qq update && \
-#    apt-get -qq install nodejs=14.18.3-deb-1nodesource1 && \
-#    apt-get -qq clean
-
 RUN cd && \
-    wget -q "https://deb.nodesource.com/node_14.x/pool/main/n/nodejs/nodejs_14.18.3-deb-1nodesource1_amd64.deb" -O nodejs.deb && \
-    apt-get -qq install ./nodejs.deb
+    wget -q "https://deb.nodesource.com/node_14.x/pool/main/n/nodejs/nodejs_${NODEJS_VERSION}-deb-1nodesource1_amd64.deb" -O nodejs.deb && \
+    apt-get -qq install ./nodejs.deb && \
+    npm install -g corepack && \
+    corepack enable
 
 RUN cd && \
     wget -q "https://static-meteor.netdna-ssl.com/packages-bootstrap/${METEOR_VERSION}/meteor-bootstrap-os.linux.x86_64.tar.gz" -O meteor-bootstrap.tar.gz && \