Setup fastlane

fastlane/Appfile

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+json_key_file("./fastlane-service-account.json")
+package_name("net.underdesk.circolapp")

fastlane/Fastfile

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+# This file contains the fastlane.tools configuration
+# You can find the documentation at https://docs.fastlane.tools
+#
+# For a list of all available actions, check out
+#
+#     https://docs.fastlane.tools/actions
+#
+# For a list of all available plugins, check out
+#
+#     https://docs.fastlane.tools/plugins/available-plugins
+#
+
+# Uncomment the line if you want fastlane to automatically update itself
+# update_fastlane
+
+default_platform(:android)
+
+platform :android do
+  desc "Submit a new Nightly Build to Firebase App Distribution"
+  lane :nightly do
+    ENV["VERSION_CODE"] = number_of_commits(all: true).to_s
+    ENV["VERSION_NAME"] = last_git_commit[:abbreviated_commit_hash]
+
+    gradle(task: "clean assembleDebug")
+
+    changelog_from_git_commits
+
+    firebase_app_distribution(
+      app: "1:455942942122:android:8036e8ee6d3f24ef150fd3",
+      groups: "interni"
+    )
+  end
+
+  desc "Deploy a new version to the Google Play"
+  lane :deploy do
+    ENV["VERSION_CODE"] = number_of_commits(all: true).to_s
+    ENV["VERSION_NAME"] = last_git_commit[:abbreviated_commit_hash]
+
+    gradle(task: "clean assembleRelease")
+    upload_to_play_store
+  end
+end

fastlane/Pluginfile

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+# Autogenerated by fastlane
+#
+# Ensure this file is checked in to source control!
+
+gem 'fastlane-plugin-firebase_app_distribution'

fastlane/README.md

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+fastlane documentation
+================
+# Installation
+
+Make sure you have the latest version of the Xcode command line tools installed:
+
+```
+xcode-select --install
+```
+
+Install _fastlane_ using
+```
+[sudo] gem install fastlane -NV
+```
+or alternatively using `brew install fastlane`
+
+# Available Actions
+## Android
+### android nightly
+```
+fastlane android nightly
+```
+Submit a new Nightly Build to Firebase App Distribution
+### android deploy
+```
+fastlane android deploy
+```
+Deploy a new version to the Google Play
+
+----
+
+This README.md is auto-generated and will be re-generated every time [fastlane](https://fastlane.tools) is run.
+More information about fastlane can be found on [fastlane.tools](https://fastlane.tools).
+The documentation of fastlane can be found on [docs.fastlane.tools](https://docs.fastlane.tools).