Install ImageMagick on Docker

This is my Dockerfile

FROM php:8.1-fpm

# Arguments defined in docker-compose.yml
ARG user
ARG uid
ARG NODE_VERSION=16

# Install system dependencies
RUN apt-get update && apt-get install -y \
    git \
    curl \
    libpng-dev \
    libonig-dev \
    libxml2-dev \
    zip \
    unzip

# Clear cache
RUN apt-get clean && rm -rf /var/lib/apt/lists/*

# Install PHP extensions
RUN docker-php-ext-install pdo_mysql mbstring exif pcntl bcmath gd

# Get latest Composer
COPY --from=composer:latest /usr/bin/composer /usr/bin/composer

RUN apt-get update && apt-get install -y \
    libmagickwand-dev --no-install-recommends && rm -rf /var/lib/apt/lists/* \
    && pecl install imagick-6.9 \
	&& docker-php-ext-enable imagick \
    && curl -sL https://deb.nodesource.com/setup_$NODE_VERSION.x | bash - \
    && apt-get install -y nodejs \
    && npm install -g npm

RUN sed -i 's/policy domain="coder" rights="none" pattern="PDF"/policy domain="coder" rights="read|write" pattern="PDF"/' /etc/ImageMagick-6/policy.xml

# Create system user to run Composer and Artisan Commands
RUN useradd -G www-data,root -u $uid -d /home/$user $user
RUN mkdir -p /home/$user/.composer && \
    chown -R $user:$user /home/$user

# Set working directory
WORKDIR /var/www

USER $user

However, am getting error :

ImagemagickError

Failed to read file 

Imagick Modules looks installed:

docker-compose exec app /bin/bash
home@8e09e534f8eb:/var/www$ php -i | grep magi
Warning: Module "imagick" is already loaded in Unknown on line 0
/usr/local/etc/php/conf.d/docker-php-ext-imagick.ini,
/usr/local/etc/php/conf.d/ext-imagick.ini
libmagic => 540
imagick
imagick module => enabled
imagick module version => 3.7.0
imagick classes => Imagick, ImagickDraw, ImagickPixel, ImagickPixelIterator, ImagickKernel
Imagick compiled with ImageMagick version => ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
Imagick using ImageMagick library version => ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
imagick.allow_zero_dimension_images => 0 => 0
imagick.locale_fix => 0 => 0
imagick.progress_monitor => 0 => 0
imagick.set_single_thread => 1 => 1
imagick.shutdown_sleep_count => 10 => 10
imagick.skip_version_check => 0 => 0