Revert "use Node.js 22 instead of Node.js 20 in Dockerfile"

This reverts commit f0e0dd4.

Currently, there is no prebuilt for the canvas package for
Node.js 22, so we would have to build it from source and install
all the required dependencies. That would increase the size of
the final Docker image to almost twice the current size, and I
don't think that is acceptable. So let's wait for a newer release
of canvas which brings the corresponding prebuilt package.

Dockerfile

@@ -24,8 +24,8 @@ RUN wget https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key && \
     cat nodesource-repo.gpg.key | gpg --dearmor -o /usr/share/keyrings/nodesource.gpg && \
     chmod 644 /usr/share/keyrings/nodesource.gpg && \
     unlink nodesource-repo.gpg.key && \
-    echo "# Node.js 22.x for Debian 12" > /etc/apt/sources.list.d/nodejs.list \
-    && echo "deb [signed-by=/usr/share/keyrings/nodesource.gpg] https://deb.nodesource.com/node_22.x nodistro main" >> /etc/apt/sources.list.d/nodejs.list && \
+    echo "# Node.js 20.x for Debian 12" > /etc/apt/sources.list.d/nodejs.list \
+    && echo "deb [signed-by=/usr/share/keyrings/nodesource.gpg] https://deb.nodesource.com/node_20.x nodistro main" >> /etc/apt/sources.list.d/nodejs.list && \
     apt-get update && apt-get install --no-install-recommends -y nodejs
 # Create directory for application.
 RUN mkdir -p /opt/export-server

changelog.md

@@ -10,12 +10,6 @@ Since [ECharts](https://echarts.apache.org/) is the main dependency of this
 application, major version changes in ECharts will also trigger a major version
 change in this application.
 
-## Version ?.?.? (2024-11-??)
-
-* __[maintenance]__
-Update Dockerfile to use Node.js 22 instead of Node.js 20. Node.js 22 is the
-current active LTS release of Node.js.
-
 ## Version 6.0.5 (2024-10-29)
 
 * __[maintenance]__