add new php version 8.1

v8.1/Dockerfile

@@ -0,0 +1,29 @@
+FROM php:8.1.0-alpine
+
+RUN apk update && apk add --no-cache $PHPIZE_DEPS \
+    && apk add --no-cache zlib-dev gd-dev libwebp-dev freetype-dev libpng-dev libjpeg-turbo-dev \
+        curl zip libzip-dev gmp-dev \
+        imap-dev openssl-dev git zsh
+
+RUN docker-php-ext-configure gd --enable-gd \
+        --with-freetype \
+        --with-jpeg \
+        --with-webp \
+    && docker-php-ext-install gd \
+    && docker-php-ext-configure bcmath && docker-php-ext-install bcmath \
+    && docker-php-ext-configure zip --with-zip && docker-php-ext-install zip \
+    && docker-php-ext-install gmp \
+    && PHP_OPENSSL=yes docker-php-ext-configure imap --with-imap-ssl \
+    && docker-php-ext-install imap
+
+ARG PHP_XDEBUG_VERSION=3.1.2
+RUN pecl install xdebug-${PHP_XDEBUG_VERSION} && docker-php-ext-enable xdebug
+
+# Install composer
+ARG COMPOSER_VERSION=2.1.14
+RUN curl -sS https://getcomposer.org/installer | php -- \
+        --filename=composer \
+        --version=${COMPOSER_VERSION} \
+        --install-dir=/usr/local/bin
+RUN mkdir -m 777 -p /var/composer/
+ENV COMPOSER_HOME /var/composer/