removed capability of setting hostname on run time.

added APP_HOSTNAME build argument to set hostname during build time

Author: easterncoder

README.md

@@ -38,10 +38,10 @@ or better yet, at:
 - myapp.local/phpinfo.php
 - myapp.local/adminer.php
 
-**If you wish to change the hostname from myapp.local to something else, you can do**
+To build with your a different hostname.local address, do this:
 
 ```
-APP_URL=something.local docker-compose up -d
+docker-compose build --build-arg HOST_UID=$(id -u) --build-arg APP_HOSTNAME=your_hostname
 ```
 
 ## File Paths
@@ -77,10 +77,11 @@ Example 2: to set a specific UID `--build-arg HOST_UID=1001`
 
 Web Servers:
 - `WEB`=**httpd** | nginx
+- `APP_HOSTNAME`=**myapp** | _string_
 
 Database Management System:
 - `DB`=**mariadb** | mysql
-- `DB_VERSION`=**latest** | num
+- `DB_VERSION`=**latest** | _num_
 
 PHP
 - `PHP_VERSION`=**7** | 7.4 | 7.3 | 7.2 | 7.1 | 7.0 | 5.6

docker-compose.yml

@@ -8,7 +8,6 @@ services:
     volumes:
       - ./app/web/:/var/www/html/
   web_server:
-    hostname: ${APP_URL:-myapp.local}
     build:
       context: './docker/web/'
     depends_on:

docker/web/Dockerfile

@@ -4,6 +4,9 @@ FROM $WEB:latest
 RUN apt-get update -y
 RUN apt-get install -y --no-install-recommends avahi-daemon libnss-mdns
 
+ARG APP_HOSTNAME="myapp.local"
+RUN echo $APP_HOSTNAME | sed 's/.local//g' > /etc/app_hostname
+
 # Copy apache config
 COPY httpd/vhost.conf /usr/local/apache2/conf/vhost.conf
 RUN echo "Include /usr/local/apache2/conf/vhost.conf" \
@@ -13,7 +16,8 @@ RUN echo "Include /usr/local/apache2/conf/vhost.conf" \
 COPY nginx/default.conf /etc/nginx/conf.d/default.conf
 
 # setup avahi
-RUN printf "[server]\nenable-dbus=no\n" >> /etc/avahi/avahi-daemon.conf
+RUN printf "[server]\nenable-dbus=no\nhost-name=$(cat /etc/app_hostname)\n" >> /etc/avahi/avahi-daemon.conf
 
 # run avahi and the web server
-CMD avahi-daemon --daemonize --no-drop-root; httpd -DFOREGROUND || nginx -g "daemon off;"
+CMD avahi-daemon --daemonize --no-drop-root; \
+httpd -DFOREGROUND || nginx -g "daemon off;"