docs(readme): add docker

README.md

@@ -12,6 +12,7 @@
 > - Tested (~100% Code coverage)
 > - ✅ Ready for new ČSFD 2025!
 > - You can use in:
+>   - Docker – [_How to do it?_](#-docker)
 >   - Firebase function
 >   - AWS λ (lambda function)
 >   - CloudFlare Worker
@@ -361,6 +362,34 @@ csfd
 
 _Note: You can not use both parameters `includesOnly` and `excludes`. Parameter `includesOnly` has a priority._
 
+## 📦 Docker
+
+You can use this library in Docker.
+
+We have [prepared a Docker image](https://hub.docker.com/r/bartholomej/node-csfd-api) for you.
+
+### Prebuilt image
+
+```bash
+docker pull bartholomej/node-csfd-api
+```
+
+### Build & run your own image
+
+> Build image
+
+```bash
+docker build -t node-csfd-api .
+```
+
+> Run image on port 3000
+
+```bash
+docker run -p 3000:3000 node-csfd-api
+```
+
+> Open http://localhost:3000 (`/movies/535121`, `/search/quentin+tarantino`, `/creators/2120`, `/user-ratings/912-bart`, ...)
+
 ## 🧑‍💻 Used by
 
 ### Web extensions