added proxy feature for webserver container

webserver/000-default.conf

@@ -0,0 +1,8 @@
+<VirtualHost *:80>
+        ServerAdmin webmaster@localhost
+        DocumentRoot /var/www/html
+
+        ErrorLog ${APACHE_LOG_DIR}/error.log
+        CustomLog ${APACHE_LOG_DIR}/access.log combined
+        ProxyPass / http://app:5000/
+</VirtualHost>

webserver/Dockerfile.proxy

@@ -0,0 +1,18 @@
+FROM debian:12-slim
+RUN apt update
+RUN apt install apache2 -y
+RUN a2enmod proxy_http
+RUN a2dissite 000-default
+COPY index.html /var/www/html
+COPY 000-default.conf /etc/apache2/sites-available
+RUN a2ensite 000-default
+EXPOSE 80
+RUN mkdir -p /var/run/apache2 &&\
+    chown www-data:www-data /var/run/apache2
+ENV APACHE_RUN_DIR /var/run/apache2
+ENV APACHE_PID_FILE /var/run/apache2.pid
+ENV APACHE_RUN_USER www-data
+ENV APACHE_RUN_GROUP www-data
+ENV APACHE_LOG_DIR /var/log/apache2
+ENV APACHE_SERVER_NAME localhost
+CMD ["/usr/sbin/apache2ctl", "-DFOREGROUND"]