update readme.

README.md

@@ -53,27 +53,9 @@ docker run -d \
   m1k1o/blog:latest
 ```
 
-Or in docker-compose format:
+Or for docker-compose format, see [docker-compose.yml](docker-compose.yml).
-```yml
-version: "3"
-services:
-  blog:
-    image: m1k1o/blog:latest
-    restart: unless-stopped
-    environment:
-        TZ: Europe/Vienna
-        BLOG_TITLE: Blog
-        BLOG_NAME: Max Musermann
-        BLOG_NICK: username
-        BLOG_PASS: password
-        BLOG_LANG: en
-    ports:
-      - 80:80
-    volumes:
-      - ./data:/var/www/html/data
-```
 
-## Install standalone app using `docker-compose`
+## Install standalone app using `docker-compose` with external database
 You need to install [docker-compose](https://docs.docker.com/compose/install/).
 
 ### MySQL
@@ -148,6 +130,7 @@ volumes:
 ```
 
 ### Step 1: Run `docker-compose.yml`.
+Select one of configurations above and save it to `docker-compose.yml`. Then run:
 ```sh
 docker-compose up -d
 ```

docker-compose.yml

@@ -1,33 +1,17 @@
 version: "3"
 
 services:
-  webserver:
+  blog:
     image: m1k1o/blog:latest
-    container_name: blog_apache
-    environment:
-      TZ: Europe/Vienna
-      BLOG_DB_CONNECTION: mysql
-      BLOG_MYSQL_HOST: mariadb
-      BLOG_MYSQL_PORT: 3306
-      BLOG_MYSQL_USER: blog
-      BLOG_MYSQL_PASS: blog # use secure password
-      BLOG_DB_NAME: blog
     restart: unless-stopped
+    environment:
+        TZ: Europe/Vienna
+        BLOG_TITLE: Blog
+        BLOG_NAME: Max Musermann
+        BLOG_NICK: username
+        BLOG_PASS: password
+        BLOG_LANG: en
     ports:
-      - ${HTTP_PORT-80}:80
+      - 80:80
-    volumes: 
-      - ${DATA-./data}:/var/www/html/data
-  mariadb:
-    image: mariadb:10.1
-    container_name: blog_mariadb
-    environment:
-      MYSQL_USER: blog
-      MYSQL_PASSWORD: blog # use secure password
-      MYSQL_DATABASE: blog
-      MYSQL_ROOT_PASSWORD: root # use secure password
-    restart: unless-stopped
     volumes:
-      - mariadb:/var/lib/mysql
+      - ./data:/var/www/html/data
-      - ./app/db/mysql:/docker-entrypoint-initdb.d:ro
-volumes:
-  mariadb: