bootstrap android and ios apps

composeApp/build.gradle.kts

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+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
+plugins {
+    alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.androidMultiplatformLibrary)
+    alias(libs.plugins.composeMultiplatform)
+    alias(libs.plugins.composeCompiler)
+    alias(libs.plugins.kotlinSerialization)
+}
+
+kotlin {
+    android {
+        namespace = "app.bertsatlas.shared"
+        compileSdk = libs.versions.android.compileSdk.get().toInt()
+        minSdk = libs.versions.android.minSdk.get().toInt()
+        compilerOptions.jvmTarget.set(JvmTarget.JVM_21)
+        androidResources.enable = true
+    }
+
+    listOf(iosArm64(), iosSimulatorArm64()).forEach { iosTarget ->
+        iosTarget.binaries.framework {
+            baseName = "ComposeApp"
+            isStatic = true
+            binaryOption("bundleId", "app.bertsatlas")
+        }
+    }
+
+    sourceSets {
+        commonMain.dependencies {
+            implementation(project(":domain"))
+            implementation(libs.compose.runtime)
+            implementation(libs.compose.foundation)
+            implementation(libs.compose.ui)
+            implementation(libs.compose.resources)
+            implementation(libs.compottie.lite)
+            implementation(libs.kotlinx.coroutines.core)
+            implementation(libs.kotlinx.datetime)
+            implementation(libs.kotlinx.serialization.json)
+        }
+    }
+}

composeApp/src/commonMain/kotlin/app/bertsatlas/App.kt

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+package app.bertsatlas
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.text.BasicText
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+
+@Composable
+fun App() {
+    Column(
+        modifier = Modifier.fillMaxSize().background(Color(0xFFF7F0DF)).padding(24.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally,
+    ) {
+        BasicText("Bert's Atlas", style = TextStyle(color = Color(0xFF3E2447), fontSize = 36.sp))
+        BasicText(
+            "Getting nerdier every day.",
+            modifier = Modifier.padding(vertical = 16.dp),
+            style = TextStyle(color = Color(0xFF3E2447), fontSize = 18.sp),
+        )
+        BasicText(
+            "Start",
+            modifier = Modifier
+                .heightIn(min = 48.dp)
+                .background(Color(0xFF19647E))
+                .clickable(onClick = {})
+                .padding(horizontal = 32.dp, vertical = 14.dp),
+            style = TextStyle(color = Color.White, fontSize = 18.sp),
+        )
+    }
+}

composeApp/src/iosMain/kotlin/app/bertsatlas/MainViewController.kt

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+package app.bertsatlas
+
+import androidx.compose.ui.window.ComposeUIViewController
+
+fun MainViewController() = ComposeUIViewController { App() }
+