Updated README.

README.md

@@ -1,8 +1,48 @@
 # reddit-slideshow
+
 Site that displays a slideshow with images/gifs obtained from reddit. By default images will be fetched from reddit frontpage.
 
 Currently hosted at https://redditslideshow.com/
 
+## Additional Info
+
+My contribution to this is:
+
+- Serving the application through a Docker image.
+- Added a basic landing page with easy to access links for specific slideshows.
+
+### Hosting with Docker
+
+You can base yourself off this `docker-compose.yml` file:
+
+```yaml
+version: "3.9"
+
+services:
+  service:
+    image: code.moonstar-x.dev/public/reddit-slideshow:latest
+    restart: unless-stopped
+    volumes:
+      - ./settings.json:/usr/share/nginx/html/settings.json
+    ports:
+      - 8080:8080
+    environment:
+      - TZ=America/Guayaquil
+```
+
+The `settings.json` file should contain something like this:
+
+```json
+{
+  "slideshows": [
+    "funny",
+    ["memes", "pics"]
+  ]
+}
+```
+
+Single subreddits are strings whereas multireddits are arrays.
+
 ## Usage
 You can go to the previous/next slide by pressing `A` or `D` respectively, or by using the arrow keys.