all three containers works with alpine and user are configured

srcs/requirements/nginx/Dockerfile

@@ -28,6 +28,10 @@
 	COPY ./conf/nginx.conf.alpine /etc/nginx/nginx.conf
 	COPY ./conf/inception_nginx.conf /etc/nginx/http.d/
 
+	# create user www-data and assign it to group www-data
+	RUN adduser -S www-data && \
+		adduser www-data www-data
+
 # common -----------------------------------------------------
 
 # personalized index.html