Added Dockerfiles and scripts to run the dev build of Colossus through Docker

Dockerfile

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+# PHP composer to get dependencies
+FROM composer:2.5 as COMPOSER
+
+WORKDIR /usr/src/colossus/
+
+COPY composer.* /usr/src/colossus/
+
+# Install dependencies
+RUN composer install
+RUN composer update
+
+# Actual PHP runtime
+FROM php:8.2-cli
+
+WORKDIR /usr/src/colossus/
+
+COPY --from=COMPOSER /usr/src/colossus/vendor/ /usr/src/colossus/vendor/
+COPY . /usr/src/colossus/
+
+VOLUME /usr/src/colossus/vendor/
+
+EXPOSE 8080
+
+# Run the app
+CMD [ "php", "-S", "0.0.0.0:8080", "-t", "public/", "public/index.php" ]