add env to specify bot version, update readme

Dockerfile

@@ -8,10 +8,12 @@ RUN install_packages openjdk-11-jre-headless wget curl grep \
 
 STOPSIGNAL SIGTERM
 
+ENV BOT_VERSION latest
+
 COPY run_bot.sh /app/run_bot.sh
-RUN chmod 700 /app/run_bot.sh
+RUN chmod +x /app/run_bot.sh
 
 WORKDIR /app
-VOLUME  /config
+VOLUME /config
 
 CMD ["./run_bot.sh"]

README.md

@@ -1,31 +1,25 @@
 # JMusicBot Docker
 [![Release](https://img.shields.io/github/release/jagrosh/MusicBot?color=g&style=for-the-badge)](https://github.com/jagrosh/MusicBot/releases/latest)
-[![Docker Hub Pulls](https://img.shields.io/docker/pulls/yojoshb/jmusicbot?color=blue&style=for-the-badge)](https://hub.docker.com/r/yojoshb/jmusicbot)
 ![Supports amd64 Architecture](https://img.shields.io/badge/amd64-yes-blueviolet.svg?style=for-the-badge)
 ![Supports arm64 Architecture](https://img.shields.io/badge/arm64-yes-blueviolet.svg?style=for-the-badge)
 
-Docker container for the latest version of [JMusicBot](https://github.com/jagrosh/MusicBot)
+A simple Docker container for [JMusicBot](https://github.com/jagrosh/MusicBot)
 
 ## Usage
-Place your **config.txt**, **Playlists** folder, and **serversettings.json** file (if you have one) in `yourpath/toconfig` to map it to the container. If you need to access the container you can hop into it and get a shell using:
+- Place your **config.txt**, **Playlists** folder, and **serversettings.json** file (if you have one) in `/your/path/to/config`. This directory will be shared with the container.
+- You can specify a JMusicBot version using the environment value `BOT_VERSION`. By default it will use the latest version so you do not have to include the value if you don't want to.
 
-```bash
-docker exec -it jmusicbot /bin/bash
-```
-
----
-
-### Docker CLI
+### Docker examples
+- Using docker cli
 ```bash
 docker run -dit \  
   --name=jmusicbot \
-  -v /yourpath/toconfig:/config \
+  -v /your/path/to/config:/config \
   --restart=unless-stopped \
   ghcr.io/yojoshb/jmusicbot-docker
 ```
 
-### Docker Compose
-
+- Using docker compose
 ```bash
 ---
 version: "3"
@@ -33,7 +27,22 @@ services:
   jmusicbot:
     image: ghcr.io/yojoshb/jmusicbot-docker
     container_name: jmusicbot
+    environment:
+      - BOT_VERSION=0.3.9 # You can leave this out if you just want to run the latest version
     volumes:
-      - /yourpath/toconfig:/config
+      - /your/path/to/config:/config
     restart: unless-stopped
 ```
+
+---
+
+#### Debugging
+- If you need to access the container you can hop into it and get a shell using:
+```bash
+docker exec -it jmusicbot /bin/bash
+```
+
+- Or read the logs if your having issues
+```bash
+docker logs jmusicbot
+```

run_bot.sh

@@ -1,11 +1,17 @@
-#!/bin/sh
+#!/bin/bash
 
-echo "Starting JMusicBot"
+# Set the default version to latest
+VER_DEFAULT=$(curl --silent "https://api.github.com/repos/jagrosh/MusicBot/releases/latest" | grep -Po '"tag_name": "\K.*?(?=")')
 
-VER=$(curl --silent "https://api.github.com/repos/jagrosh/MusicBot/releases/latest" | grep -Po '"tag_name": "\K.*?(?=")')
-
-if [ ! -f JMusicBot-$VER.jar ]; then	
-  wget https://github.com/jagrosh/MusicBot/releases/download/$VER/JMusicBot-$VER.jar
+# If the ENV is not explicitly set, use the sourced ENV from the Dockerfile
+if [ $BOT_VERSION == "latest" ]; then
+  BOT_VERSION=$VER_DEFAULT
 fi
 
-java -Dnogui=true -Dconfig=/config/config.txt -jar JMusicBot-$VER.jar 
+echo -e "Downloading JMusicBot $BOT_VERSION"
+if [ ! -f JMusicBot-$BOT_VERSION.jar ]; then	
+  wget https://github.com/jagrosh/MusicBot/releases/download/$BOT_VERSION/JMusicBot-$BOT_VERSION.jar
+fi
+
+echo -e "Starting JMusicBot $BOT_VERSION"
+java -Dnogui=true -Dconfig=/config/config.txt -jar JMusicBot-$BOT_VERSION.jar