Add docker-compose for easier local preview (#287)

README.md

@@ -35,6 +35,15 @@ Change all the details from one place: ``_data/data.yml``
 
 Watch my [video](https://www.youtube.com/embed/T2nx6tj-ZH4) on installation.
 
+## To preview/edit localy with docker
+
+```sh
+docker-compose up
+```
+
+*docker-compose.yml* file is used to create a container that is reachable under http://localhost:4000.
+Changes *_data/data.yml* will be visible after a while.
+
 ## Skins
 
 There are 6 color schemes available:

docker-compose.yml

@@ -0,0 +1,9 @@
+version: "3.8"
+services:
+  jekyll:
+      image: jekyll/jekyll:3.8
+      command: jekyll serve --force_polling
+      ports:
+          - 4000:4000
+      volumes:
+          - .:/srv/jekyll