refactor: add spacing within the Dockerfile

tools/docker/images/Dockerfile

@@ -1,34 +1,57 @@
 FROM opdavies/sculpin-serve AS app
 
+#
+
 FROM app AS build
+
 ENV PATH=$PATH:/app/vendor/bin/phpunit
+
 WORKDIR /app
+
 COPY composer.* ./
+
 RUN composer install --no-dev
+
 COPY app app
 COPY source source
 COPY src src
+
 RUN sculpin generate --env prod
 
+#
+
 FROM node:14 AS assets
+
 WORKDIR /app
+
 COPY package*.json ./
 RUN npm ci
+
 COPY . .
+
 RUN npm run production
 
+#
+
 FROM nginx:1 AS production
+
 COPY tools/docker/images/nginx/root/ /
+
 RUN mkdir -p /code && \
   chown -R nginx:nginx /code && \
   chmod -R 755 /code && \
   chown -R nginx:nginx /var/cache/nginx && \
   chown -R nginx:nginx /var/log/nginx && \
   chown -R nginx:nginx /etc/nginx/conf.d
+
 RUN touch /var/run/nginx.pid && \
   chown -R nginx:nginx /var/run/nginx.pid
+
 USER nginx
+
 WORKDIR /code
+
 COPY --chown=nginx --from=build /app/output_prod ./
 COPY --chown=nginx --from=assets /app/source/build build
+
 EXPOSE 8080