Installation of php8.1 with a Docker

I’m trying to install php8.1 and composer with a dockerfile but it returns some errors of unfound packages. What I have to do to solve my problem?

[****@#### picture-this-web]$ docker build -t picturethis:0.2 .
Sending build context to Docker daemon  4.291MB
Step 1/13 : FROM php:8.1 as php-builder
 ---> 5478436e6090
Step 2/13 : RUN apt-get update && apt-get install -y     curl unzip php8.1 php8.1-cli php8.1-mbstring php8.1-xml php8.1-zip php8.1-json php8.1-curl
 ---> Running in 49d1b6f54b44
Get:1 http://deb.debian.org/debian bullseye InRelease [116 kB]
Get:2 http://deb.debian.org/debian-security bullseye-security InRelease [48.4 kB]
Get:3 http://deb.debian.org/debian bullseye-updates InRelease [44.1 kB]
Get:4 http://deb.debian.org/debian bullseye/main amd64 Packages [8183 kB]
Get:5 http://deb.debian.org/debian-security bullseye-security/main amd64 Packages [237 kB]
Get:6 http://deb.debian.org/debian bullseye-updates/main amd64 Packages [14.6 kB]
Fetched 8643 kB in 1s (6084 kB/s)
Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package php8.1
E: Couldn't find any package by glob 'php8.1'
E: Couldn't find any package by regex 'php8.1'
E: Unable to locate package php8.1-cli
E: Couldn't find any package by glob 'php8.1-cli'
E: Couldn't find any package by regex 'php8.1-cli'
E: Unable to locate package php8.1-mbstring
E: Couldn't find any package by glob 'php8.1-mbstring'
E: Couldn't find any package by regex 'php8.1-mbstring'
E: Unable to locate package php8.1-xml
E: Couldn't find any package by glob 'php8.1-xml'
E: Couldn't find any package by regex 'php8.1-xml'
E: Unable to locate package php8.1-zip
E: Couldn't find any package by glob 'php8.1-zip'
E: Couldn't find any package by regex 'php8.1-zip'
E: Unable to locate package php8.1-json
E: Couldn't find any package by glob 'php8.1-json'
E: Couldn't find any package by regex 'php8.1-json'
E: Unable to locate package php8.1-curl
E: Couldn't find any package by glob 'php8.1-curl'
E: Couldn't find any package by regex 'php8.1-curl'
The command '/bin/sh -c apt-get update && apt-get install -y     curl unzip php8.1 php8.1-cli php8.1-mbstring php8.1-xml php8.1-zip php8.1-json php8.1-curl' returned a non-zero code: 100

Here is my dockerfile:

# PHP app

FROM php:8.1 as php-builder

# Actualizar el sistema e instalar las dependencias necesarias

RUN apt-get update && apt-get install -y
curl unzip php8.1 php8.1-cli php8.1-mbstring php8.1-xml php8.1-zip php8.1-json php8.1-curl

# Instalar Composer

RUN curl -sS https://getcomposer.org/installer | php — –install-dir=/usr/local/bin –filename=composer

# Install dependencies file

COPY composer*.json ./

# Install dependencies

RUN composer install

# ——————————————————–

# Node app with npm dependencies

FROM node:18.11.0-slim

COPY –from=php-builder /app /usr/src/app

# Create app directory

WORKDIR /usr/src/app

# Install app dependencies

COPY package*.json ./

# Install dependencies

RUN npm install

# Bundle app source

COPY . .

EXPOSE 5173

CMD [ “npm”, “run”, “build” ]