Add php 7.4

v7.4/Dockerfile

@@ -0,0 +1,43 @@
+FROM php:7.4.0-alpine
+
+ARG PHP_XDEBUG_VERSION=2.9.0
+ARG PHP_RDKAFKA_VERSION=3.1.2
+ARG PHP_TIMECOP_VERSION=1.2.10
+
+RUN apk update && apk add --no-cache $PHPIZE_DEPS
+RUN apk add --no-cache zlib-dev gd-dev libwebp-dev freetype-dev libpng-dev libjpeg-turbo-dev \
+    curl zip libzip-dev gmp-dev librdkafka-dev imap-dev openssl-dev
+RUN docker-php-ext-configure gd --enable-gd \
+        --with-freetype \
+        --with-jpeg \
+        --with-webp \
+    && docker-php-ext-install gd
+RUN docker-php-ext-configure bcmath && docker-php-ext-install bcmath
+RUN docker-php-ext-configure zip --with-zip && docker-php-ext-install zip
+RUN docker-php-ext-install gmp
+RUN pecl install xdebug-${PHP_XDEBUG_VERSION} && docker-php-ext-enable xdebug
+RUN pecl install rdkafka-${PHP_RDKAFKA_VERSION} && docker-php-ext-enable rdkafka
+RUN PHP_OPENSSL=yes docker-php-ext-configure imap --with-imap-ssl \
+    && docker-php-ext-install imap
+
+# Install composer
+RUN curl -sS https://getcomposer.org/installer | php -- \
+        --filename=composer \
+        --install-dir=/usr/local/bin
+RUN mkdir -m 777 -p /var/composer/
+ENV COMPOSER_HOME /var/composer/
+
+# Install timecop
+RUN curl -L -o /tmp/timecop.tar.gz https://github.com/hnw/php-timecop/archive/v${PHP_TIMECOP_VERSION}.tar.gz \
+    && mkdir -p timecop \
+    && tar xfz /tmp/timecop.tar.gz -C timecop --strip-components=1 \
+    && rm -r /tmp/timecop.tar.gz \
+    && ( \
+        cd timecop \
+        && phpize \
+        && ./configure \
+        && make -j$(nproc) \
+        && make install \
+    ) \
+    && rm -r timecop \
+    && docker-php-ext-enable timecop