Emoji appearing properly but in single color (alpine, node-canvas, fabricjs)

It seems like the emojis are installed and rendered properly, but the color is always the same as the text. I use it to render fabric.js on top of node-canvas, running on docker image with alpine and node 18.

I tried to dig up some sources around with the following information:

Linux need the font to run on CBDT mode (seems like the Apple Emoji Font supporting it?)
Tried to add 01-emoji.conf file, no luck.
The interesting thing, that it did work at December 2023, rendering full color emojis. According to my logs, it stopped to work somewhere between end of December and end of January 2024. I wonder if some dependency broke it?

Here is my Dockerfile configs:

FROM node:18-alpine

# Download the font file
RUN apk --no-cache add wget \
    && wget -O /tmp/AppleColorEmoji.ttf https://github.com/samuelngs/apple-emoji-linux/releases/latest/download/AppleColorEmoji.ttf

# Create the font directory
RUN mkdir -p /usr/share/fonts/truetype/apple-emoji

# Copy the font file to the directory
RUN cp /tmp/AppleColorEmoji.ttf /usr/share/fonts/truetype/apple-emoji/AppleColorEmoji.ttf

# Set permissions for the font file
RUN chmod 644 /usr/share/fonts/truetype/apple-emoji/AppleColorEmoji.ttf

COPY ./src/canvas-renderer/linux-configs/01-emoji.conf /etc/fonts/conf.d/01-emoji.conf
COPY ./src/canvas-renderer/linux-configs/45-generic.conf /etc/fonts/conf.d/45-generic.conf
COPY ./src/canvas-renderer/linux-configs/60-generic.conf /etc/fonts/conf.d/60-generic.conf

# Rebuild the font cache
RUN apk --no-cache add fontconfig \
    && fc-cache -f -v

# Remove the temporary font file
RUN rm /tmp/AppleColorEmoji.ttf

RUN echo 'kernel.unprivileged_userns_clone=1' >> /etc/sysctl.d/00-alpine.conf \
    && mkdir -p app \
    && apk add --no-cache \
    nss \
    freetype \
    freetype-dev \
    harfbuzz \
    ca-certificates \
    ttf-freefont \
        sudo \
        curl \
        build-base \
        g++ \
        libpng \
        libpng-dev \
        jpeg-dev \
        pango-dev \
        cairo-dev \
        giflib-dev \
        python3 \
        ;

01-emoji.conf:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <alias>
    <family>serif</family>
    <prefer>
      <family>Apple Color Emoji</family>
    </prefer>
  </alias>
  <alias>
    <family>sans-serif</family>
    <prefer>
      <family>Apple Color Emoji</family>
    </prefer>
  </alias>
  <alias>
    <family>monospace</family>
    <prefer>
      <family>Apple Color Emoji</family>
    </prefer>
  </alias>
</fontconfig>

45-generic.conf

        <alias binding="same">
                <family>Apple Color Emoji</family> <!-- Apple -->
                <default><family>emoji</family></default>
        </alias>

        <!-- Add language for emoji, to match other emoji fonts. -->
        <match>
                <test name="family">
                        <string>emoji</string>
                </test>
                <edit name="lang" mode="prepend">
                        <string>und-zsye</string>
                </edit>
        </match>

        <match>
                <test name="lang">
                        <string>und-zsye</string>
                </test>
                <test qual="all" name="family" compare="not_eq">
                        <string>emoji</string>
                </test>

                <!-- Add generic family. -->
                <edit name="family" mode="append" binding="strong">
                        <string>emoji</string>
                </edit>
        </match>

60-generic.conf

<!-- Emoji -->

<!-- Prefer to match color emoji font. -->
<match>
        <test name="lang">
                <string>und-zsye</string>
        </test>
        <test qual="all" name="color" compare="not_eq">
                <bool>true</bool>
        </test>
        <test qual="all" name="color" compare="not_eq">
                <bool>false</bool>
        </test>
        <edit name="color" mode="append">
                <bool>true</bool>
        </edit>
</match>

<!-- TODO
    ! Match on "color" and alias B&W ones first if no color is requested.
    ! That's "hard" because <alias> doesn't work in match and needs to be
    ! expanded to its non-sugar form.
    !-->
<alias binding="same">
        <family>emoji</family>
        <prefer>
                <!-- System fonts -->
                <family>Apple Color Emoji</family> <!-- Apple -->
        </prefer>
</alias>

samuelngs / apple-emoji-linux

Emoji appearing properly but in single color (alpine, node-canvas, fabricjs) #52