Add boilerplate code, Docker environment, Makefile etc.

Dockerfile

@@ -0,0 +1,30 @@
+FROM php:7.3-apache AS base
+
+WORKDIR /var/www
+
+RUN apt-get update && \
+    apt-get install -y libzip-dev unzip git && \
+    docker-php-ext-install pdo pdo_mysql zip
+
+RUN a2enmod rewrite && \
+    sed -ri -e 's!/var/www/html!/var/www/public!g' /etc/apache2/sites-available/*.conf
+
+COPY --from=composer /usr/bin/composer /usr/bin/composer
+
+
+FROM base AS development
+
+RUN cp $PHP_INI_DIR/php.ini-development $PHP_INI_DIR/php.ini && \
+    pecl install xdebug && \
+    docker-php-ext-enable xdebug
+
+
+# TODO: production image untested
+#FROM base AS production
+#
+#RUN cp $PHP_INI_DIR/php.ini-production $PHP_INI_DIR/php.ini
+#
+#COPY vendor/ /var/www/vendor/
+#COPY public/ /var/www/public/
+#COPY src/ /var/www/src/
+#COPY templates/ /var/www/templates/