Use Alpine based Nginx image for Web container

web/Dockerfile

@@ -1,4 +1,4 @@
-FROM nginx:mainline
+FROM nginx:mainline-alpine
 
 # Remove default configuration and add our custom Nginx configuration files
 RUN rm /etc/nginx/conf.d/default.conf

web/entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # Define default value for app container hostname and port
 APP_HOST=${APP_HOST:-app}