Made watch also specific for browser and electron and updated README.

Added Docker packaging in README.

README.md

@@ -49,9 +49,13 @@ Currently there is still an issue where new files are not recognized automatical
 
 ## Developing
 
-Start watching all packages, including `electron-app`, of your application with
+Start watching all packages of your application for either browser or electron version.
 
-    yarn watch
+    yarn watch:browser
+
+_or_
+
+    yarn watch:electron
 
 _or_ watch only specific packages with
 
@@ -81,11 +85,30 @@ Short steps:
 
 ## Packaging
 
-To package the application use
+We package CrossModel either for the browser (Docker) or desktop application (Electron).
+
+### Docker
+
+To package the web application we build a docker image. There are currently two Dockerfile definitions, one based on [Alpine Linux](./Dockerfile) and one based on [Ubuntu](./Dockerfile.ubuntu). Some users might prefer Ubuntu over Alpine as based, which is why we have both options.
+
+To create the Alpine based image, execute the following command:
+
+    docker build -t crossmodel:0.0.0-alpine -f .\Dockerfile .
+
+To create the Ubuntu based image, execute the following command:
+
+    docker build -t crossmodel:0.0.0-ubuntu -f .\Dockerfile.ubuntu .
+
+In the main build action we build and publish the Alpine version.
+
+### Electron
+
+To package CrossModel as a desktop application, execute the following command:
 
     yarn theia:electron package
 
 Depending on the platform, this will produce an executable or an installer for the application under `applications/electron-app/dist`.
+
 Details about the packaging can be configured in `applications/electron-app/electron-builder.yml`.
 
 ## Structure

package.json

@@ -31,7 +31,8 @@
     "theia:bundle": "yarn theia:electron bundle && yarn theia:browser bundle",
     "theia:electron": "yarn --cwd applications/electron-app",
     "ui-test": "yarn --cwd e2e-tests ui-test",
-    "watch": "lerna run --parallel watch"
+    "watch:browser": "lerna run --parallel --ignore=\"applications/electron-app\" watch",
+    "watch:electron": "lerna run --parallel --ignore=\"applications/browser-app\" watch"
   },
   "devDependencies": {
     "@testing-library/react": "^11.2.7",