feat: configure Firebase and signing for multiple environments in mobile app

mobile-apps/staff-app/android/app/build.gradle

@@ -1,12 +1,12 @@
 plugins {
     id "com.android.application"
-    id 'com.google.gms.google-services'
+    id "com.google.gms.google-services"
     id "kotlin-android"
     id "dev.flutter.flutter-gradle-plugin"
 }
 
 def keystoreProperties = new Properties()
-def keystorePropertiesFile = rootProject.file('key.properties')
+def keystorePropertiesFile = rootProject.file("key.properties")
 if (keystorePropertiesFile.exists()) {
     keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
 }
@@ -33,13 +33,49 @@ android {
         versionName = flutter.versionName
     }
 
+    def keystorePropertiesFileNameDev = "key_dev.properties"
+    def keystorePropertiesDev = new Properties()
+    keystorePropertiesDev.load(new FileInputStream(rootProject.file(keystorePropertiesFileNameDev)))
+
+    def keystorePropertiesFileNameStaging = "key_staging.properties"
+    def keystorePropertiesStaging = new Properties()
+    keystorePropertiesStaging.load(new FileInputStream(rootProject.file(keystorePropertiesFileNameStaging)))
+
+    def keystorePropertiesFileNameProd = "key_prod.properties"
+    def keystorePropertiesProd = new Properties()
+    keystorePropertiesProd.load(new FileInputStream(rootProject.file(keystorePropertiesFileNameProd)))
+
     flavorDimensions "release-type"
 
+    signingConfigs {
+        configDev {
+            keyAlias keystorePropertiesDev['keyAlias']
+            keyPassword keystorePropertiesDev['keyPassword']
+            storeFile file('../key_dev.jks')
+            storePassword keystorePropertiesDev['storePassword']
+        }
+
+        configStaging {
+            keyAlias keystorePropertiesStaging['keyAlias']
+            keyPassword keystorePropertiesStaging['keyPassword']
+            storeFile file('../key_staging.jks')
+            storePassword keystorePropertiesStaging['storePassword']
+        }
+
+        configProd {
+            keyAlias keystorePropertiesProd['keyAlias']
+            keyPassword keystorePropertiesProd['keyPassword']
+            storeFile file('../key_staging.jks')
+            storePassword keystorePropertiesProd['storePassword']
+        }
+    }
+
     productFlavors {
         dev {
             dimension "release-type"
             applicationIdSuffix ".dev"
             versionNameSuffix "-dev"
+            signingConfig signingConfigs.configDev
             manifestPlaceholders = [
                     appLabel: "Krow Staff dev",
                     appIcon : "@mipmap/ic_launcher_dev"
@@ -50,6 +86,7 @@ android {
             dimension "release-type"
             applicationIdSuffix ".staging"
             versionNameSuffix "-staging"
+            signingConfig signingConfigs.configStaging
             manifestPlaceholders = [
                     appLabel: "Krow Staff staging",
                     appIcon : "@mipmap/ic_launcher_dev"
@@ -58,27 +95,13 @@ android {
 
         prod {
             dimension "release-type"
+            signingConfig signingConfigs.configProd
             manifestPlaceholders = [
                     appLabel: "Krow Staff",
                     appIcon : "@mipmap/ic_launcher"
             ]
         }
     }
-
-    signingConfigs {
-        release {
-            keyAlias = keystoreProperties['keyAlias']
-            keyPassword = keystoreProperties['keyPassword']
-            storeFile = keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
-            storePassword = keystoreProperties['storePassword']
-        }
-    }
-
-    buildTypes {
-        release {
-            signingConfig = signingConfigs.release
-        }
-    }
 }
 
 flutter {

mobile-apps/staff-app/android/app/src/staging/google-services.json

@@ -24,6 +24,25 @@
         }
       }
     },
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:1032971403708:android:6e5031c203f01cc2356bb9",
+        "android_client_info": {
+          "package_name": "com.krow.app.staff.staging"
+        }
+      },
+      "oauth_client": [],
+      "api_key": [
+        {
+          "current_key": "AIzaSyAZ4dOatvf3ZBt4qnbSlIvJ51bblHaRsRw"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": []
+        }
+      }
+    },
     {
       "client_info": {
         "mobilesdk_app_id": "1:1032971403708:android:87edb39679f806ab356bb9",