Add a Dockerfile and instructions for running with Docker/Podman

Dockerfile

@@ -0,0 +1,10 @@
+FROM node:24-slim
+
+WORKDIR /app
+
+COPY bot.js ./
+
+COPY package*.json ./
+RUN npm install --omit=dev
+
+CMD ["node", "bot.js"]

README.md

@@ -31,6 +31,8 @@ What you gonna need:
 - A server or machine to run the bot on.
 
 ## Installation
+
+### Bare metal
 1. Clone the repository:
 
 ```bash
@@ -48,16 +50,33 @@ npm install
 
 Rename the `example.config.yaml` file to config.yaml and set it up to your liking.
 
-## Config:
-You can easaily enable or disable the logging of messeges or the raw IRC info for debuging by switching `debug: false` to `debug: true`, and the same with `logForward`
+4. Start the bridge:
 
-## How to run it:
-Just run:
+To start the bridge, just run
 
 ```
 node bot.js
 ```
 
+### With Docker/Podman
+
+1. Configuration:
+
+Copy the `example.config.yaml` file, rename it to config.yaml, and set it up to your liking.
+
+2. Start the bridge
+
+To start the bridge, run:
+
+```
+docker run -v "$(pwd)/config.yaml:/app/config.yaml:ro" foundry.fsky.io/purplebored/discord-userbot-to-irc:latest
+```
+
+The /app/config.yaml file in the container must be mounted to the filesystem.
+
+## Config:
+You can easaily enable or disable the logging of messeges or the raw IRC info for debuging by switching `debug: false` to `debug: true`, and the same with `logForward`
+
 ## Notes:
 
 - Make sure your Discord selfbot token is kept private.