Readme updates (#476)

* Update README.md

- Add developer docs

* Remove RELEASE.md

README.md

@@ -12,3 +12,44 @@ Written in the [Flutter](https://flutter.dev/) environment, the app provides nat
 ## User Documentation
 
 User documentation for the InvenTree mobile app can be found [within the InvenTree documentation](https://inventree.readthedocs.io/en/latest/app/app/).
+
+## Developer Documentation
+
+For developers looking to contribute to the project, we use Flutter for app development. The project has been tested in Android Studio (on both Windows and Mac) and also VSCode.
+
+### Invoke Tasks
+
+We use the [invoke](https://www.pyinvoke.org) to run some core tasks - you will need python and invoke installed on your local system.
+
+### Getting Started
+
+Initial project setup (after you have installed all required dev tools) is as follows:
+
+Install required flutter packages:
+```
+flutter pub get
+```
+
+Generate initial translation files:
+
+```
+invoke translate
+```
+
+You should now be ready to debug on a connected or emulated device!
+
+### Building Release Versions
+
+Building release versions for target platforms (either android or iOS) is simplified using invoke:
+
+Build Android release:
+
+```
+invoke android
+```
+
+Build iOS release:
+
+```
+invoke ios
+```

RELEASE.md

@@ -1,47 +0,0 @@
-# Release Process
-
-## Android Play Store
-
-[Reference](https://flutter.dev/docs/deployment/android#signing-the-app)
-
-### Key File
-
-Add a file `key.properties` under the android/ directory
-
-### Increment Build Number
-
-Make sure that the build number is incremented every time (or it will be rejected by Play Store).
-
-### Copy Translations
-
-Ensure that the translation files have been updated, and copied into the correct directory!!
-
-```
-cd lib/l10n
-python collect_translations.py
-```
-
-### Build Appbundle
-
-`flutter build appbundle`
-
-### Upload Appbundle
-
-Upload the appbundle file to the Android developer website.
-
-## Apple Store
-
-Ref: https://flutter.dev/docs/deployment/ios
-
-### Build ipa
-
-```
-flutter clean
-flutter build ipa --release --no-tree-shake-icons
-```
-
-### Validate and Distribute
-
-- Open `./build/ios/archive/Runner.xcarchive` in Xcode
-- Run "Validate App"
-- Run "Distribute App"