docker/docs: dockerize and add+modify documentation

.dockerignore

@@ -0,0 +1,8 @@
+node_modules
+npm-debug.log
+.git
+.gitignore
+.env
+config.env
+*.md
+!README.md 

Dockerfile

@@ -0,0 +1,18 @@
+FROM node:20-slim
+
+# Install ffmpeg and other deps
+RUN apt-get update && apt-get install -y ffmpeg && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /usr/src/app
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+RUN chmod +x /usr/src/app/src/plugins/yt-dlp/yt-dlp
+
+VOLUME /usr/src/app/config.env
+
+CMD ["npm", "start"]

README.md

@@ -9,10 +9,10 @@ Kowalski is a a simple Telegram bot made in Node.js.
 
 ## Self-host requirements
 
-- Node.js 20 or newer (you can also use Bun)
+- Node.js 20 or newer (you can also use [Bun](https://bun.sh))
 - A Telegram bot (create one at [@BotFather](https://t.me/botfather))
-- Latest version of Node.js
 - FFmpeg (only for the `/yt` command)
+- Docker and Docker Compose (only required for Docker setup)
 
 ## Run it yourself, develop or contribute with Kowalski
 
@@ -36,6 +36,47 @@ After editing the file, save all changes and run the bot with ``npm start``.
 > [!TIP]
 > To deal with dependencies, just run ``npm install`` or ``npm i`` at any moment to install all of them.
 
+## Running with Docker
+
+> [!IMPORTANT]
+> Please complete the above steps to prepare your local copy for building. You do not need to install FFmpeg on your host system.
+
+You can also run Kowalski using Docker, which simplifies the setup process. Make sure you have Docker and Docker Compose installed.
+
+### Using Docker Compose
+
+1. **Make sure to setup your `config.env` file first!**
+
+2. **Run the container**
+
+   ```bash
+   docker compose up -d
+   ```
+
+   > [!NOTE]
+   > The `-d` flag causes the bot to run in the background. If you're just playing around, you may not want to use this flag.
+
+### Using Docker Run
+
+If you prefer to use Docker directly, you can use these instructions instead.
+
+1. **Make sure to setup your `config.env` file first!**
+
+2. **Build the image**
+
+   ```bash
+   docker build -t kowalski .
+   ```
+
+3. **Run the container**
+
+   ```bash
+   docker run -d --name kowalski --restart unless-stopped -v $(pwd)/config.env:/usr/src/app/config.env:ro kowalski
+   ```
+
+   > [!NOTE]
+   > The `-d` flag causes Kowalski to run in the background. If you're just playing around, you may not want to use this flag.
+
 ## config.env Functions
 
 - **botSource**: Put the link to your bot source code.

docker-compose.yml

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+services:
+  kowalski:
+    build: .
+    container_name: kowalski
+    restart: unless-stopped
+    volumes:
+      - ./config.env:/usr/src/app/config.env:ro
+    environment:
+      - NODE_ENV=production