Update README

README.md

@@ -6,25 +6,40 @@ like image overlays or POI sets.
 ## Requirements
 
 * For building:
-  * Node (tested with version 10.16.0)
-  * npm (tested with version 6.9.0)
+  * Node (tested with version 16.14.2)
+  * npm (tested with version 8.5.0)
 * For running: A current web browser
-  * Tested with Chromium 74.
+  * Tested with Chrome 100.
   * Current versions of Firefox and Google Chrome should be fine.
   * Microsoft Edge is untested, and at least the image export is expected to not work.
 
-## Build the project
+## Run the application
+
+### Using released versions
+
+* Download the latest version from the *Releases* section as zip or tar.gz archive
+* Unpack the archive
+* Serve the unpacked directory through a webserver or open `index.html` in a browser directly.
+  Note: Due to browser limitations, some features might not work if not served through a webserver.
+
+### Using Docker
+
+The latest state of the repository is automatically built as Docker image on every commit.
+If you have Docker and Docker Compose installed you can run it as follows:
 
+* Download `docker-compose.yml` to some directory
+* Run `docker-compose pull && docker-compose up` from that directory
+* Go to [localhost:8080](http://localhost:8080)
+
+### Using locally built version
+
+First install the required dependencies using `npm install`.
 Run `npm run build` to build the project. This will create all required files in the directory `dist`.
+You can then open [dist/index.html](dist/index.html) in a web browser.
 
 Alternatively, you can run `npm run build:dev` to get an uncompressed build, or `npm run watch` to
 watch for files changes and rebuild automatically.
 
-## Run the application
-
-Just open [dist/index.html](dist/index.html) in a web browser. You can serve it through a server, but
-running it from the local filesystem is enough.
-
 ## Usage
 
 Usage instructions can be found in the [manual](docs/MANUAL.md).