update and clarify docker usage

Dockerfile

@@ -7,7 +7,7 @@ RUN mkdir -p /var/www/html/episodes
 # initialize env vars with defaults
 # these can be changed with -e at docker run
 ENV MP3_DIR=/var/www/html/episodes \
-    MP3_URL=http://var/www/html/episodes \
+    MP3_URL= \
     RECURSIVE_DIRECTORY_ITERATOR=true \
     COPYRIGHT= \
     WEBMASTER= \

README.md

@@ -108,18 +108,10 @@ not covered in this guide.
 
 Local setup
 -----------
-1. Map the container's port 80 to whatever port you want to access it with on your
-   local network (e.g. port 8080)
-2. Episodes will be scanned for at `/var/www/html/episodes` unless you pass in a
-   different MP3_DIR, so make sure to create a volume to map under `/var/www/html`,
-   or directly bind the episodes folder to a location on your file system where you wish to store episodes
-4. To start the container, try something like: 
-   `docker run --name dir2cast -d -p 8080:80 -v podcast_volume:/var/www/html/episodes ctkcoding/dir2cast:latest` and add env vars to represent settings in dir2cast.ini that
-   you'd like to change from the default. Dockerfile contains a list of supported ENV
-   options and defaults that will be used to create a new dir2cast.ini at container run
-   time
-5. Once you add media files to the location you chose after step 2, your podcast
-   feed should now exist at `<docker server ip>:<container port>/rss`
+1. Review the existing docker-compose file as a baseline to start locally.
+2. Episodes are expected at `/var/www/html/episodes` unless you pass in a different MP3_DIR, so make sure to create a volume to map under `/var/www/html`, or directly bind the episodes folder to a location on your file system where you wish to store episodes.
+3. For any other changes - review the compose file and set ENV vars as you'd like. Dockerfile contains a list of supported options and defaults that will be used to create a new dir2cast.ini at container startup.
+4. Once you add media files to the location you chose after step 2, your podcast feed should now exist at `<docker ip>:<port>/rss`
 
 Remote using SWAG
 -----------------
@@ -132,17 +124,17 @@ Remote using SWAG
    restart both containers
 4. Check that podcast episodes can be played/downloaded. If your feed exists and can be
    subscribed to, but files aren't available, try setting `MP3_URL` env var  with
-   https:// rather than http://. (see comment in ini file)
+   https:// (see comment in source ini file)
 
 Notes
 -----
 * If you have shared folders that are accessible from your computer, using a bind mount
   (rather than a docker volume) is an easy way to enable a simple workflow for you to
   drag and drop content into the podcast feed.
 * If you see '.\_' prefixed junk files in your feed, that is an unfortunate side-effect
-  of using network shares from macOS, and not dir2cast's fault.
+  of using network shares from macOS, and not dir2cast's fault. Use the macOS native dot_clean command to remove these
 * 502 errors are likely SWAG configuration problems. Check container name, port mapping, etc.
-* currently the only docker env vars that can be fed in at startup and set in dir2cast.ini are ITEM_COUNT, MP3_DIR, TITLE, AUTO_SAVE_COVER_ART. Copy the RUN commands in Dockerfile for any new env vars needed
+* all dir2cast.ini variables should be supported as docker env vars - if you find this is not correct, look at the RUN commands in Dockerfile for any new env vars needed
 
 Thank you to @ctkcoding for the contribution of this guide.
 

docker-compose.yml

@@ -1,28 +1,15 @@
-version: "2.3"
-
-# after "docker-compose up" try the following URLs as examples:
-# http://localhost:8080/
-# http://localhost:8080/test/fixtures/
-
+volumes:
+  config:
+
 services:
-    web:
-        image: nginx:alpine
-        ports:
-            - "8080:80"
-        volumes:
-            - .:/var/www/html
-            - ./docker-compose/nginx/default.conf:/etc/nginx/conf.d/default.conf
-        links:
-            - php-fpm
-
-    php-fpm:
-        image: php:7-fpm-alpine
-        volumes:
-            - .:/var/www/html
-
-            # You could also create a Dockerfile FROM php:7-fpm-alpine which includes these next two
-            - ./dir2cast.php:/dir2cast.php
-            - ./getID3:/getID3
-
-            # You should map a temp folder in otherwise you'll see errors about permission denied mkdir()
-            - /tmp:/temp
+  podcast:
+    image: ghcr.io/ctkcoding/dir2cast:main
+    container_name: podcast
+    restart: unless-stopped
+    ports:
+      - "2022:80"
+    volumes:
+      - episode_location:/var/www/html/episodes
+      - config:/var/www/html
+    # environment:
+      # - MP3_URL = https://domain.com/episodes/

entrypoint.sh

@@ -1,5 +1,11 @@
 #!/bin/bash
 
+file="/var/www/html/dir2cast.ini"
+
+if [ -f "$file" ] ; then
+    rm "$file"
+fi
+
 echo MP3_DIR = $MP3_DIR \ >> /var/www/html/dir2cast.ini
 echo MP3_URL= $MP3_URL \  >> /var/www/html/dir2cast.ini
 echo RECURSIVE_DIRECTORY_ITERATOR = $RECURSIVE_DIRECTORY_ITERATOR \ >> /var/www/html/dir2cast.ini