Initial commit: Scala/Thorium task manager demo app

Dockerfile

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+# === Build stage ===
+FROM eclipse-temurin:17 AS build
+
+# Install sbt
+RUN apt-get update && apt-get install -y curl gnupg && \
+    echo "deb https://repo.scala-sbt.org/scalasbt/debian all main" > /etc/apt/sources.list.d/sbt.list && \
+    curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | apt-key add && \
+    apt-get update && apt-get install -y sbt && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Cache dependency resolution
+COPY build.sbt .
+COPY project/build.properties project/
+COPY project/plugins.sbt project/
+RUN sbt update
+
+# Copy source and build fat JAR
+COPY src/ src/
+RUN sbt assembly
+
+# === Runtime stage ===
+FROM eclipse-temurin:17-jre-alpine
+
+RUN addgroup -S app && adduser -S app -G app
+WORKDIR /app
+
+COPY --from=build /app/target/scala-3.7.1/demoapp.jar ./demoapp.jar
+
+RUN chown -R app:app /app
+USER app
+
+EXPOSE 8080
+
+ENV PORT=8080
+ENV JAVA_OPTS="-XX:MaxRAMPercentage=75.0 -XX:+UseSerialGC"
+
+ENTRYPOINT ["sh", "-c", "exec java $JAVA_OPTS -jar demoapp.jar"]

README.md

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+# demoapp — Clouderized Demo App
+
+A task manager built with Scala 3 + Thorium, used to demo the full Clouderized deployment cycle: edit config, push, rebuild, see changes live.
+
+## Prerequisites
+
+- Access to `git.clouderized.com` (Gitea)
+- The app deployed at `demoapp.clouderized.com`
+
+## Running the Demo
+
+### 1. Show the live app
+
+Open `https://demoapp.clouderized.com` in a browser. Point out:
+
+- The **teal header** with app name and version (v1.0.0)
+- CRUD functionality — add, complete, and delete tasks
+- The `/health` endpoint returning `{"status":"ok"}`
+
+### 2. Make a visible change
+
+Edit `src/main/resources/site.conf`:
+
+```diff
+ app {
+-  name = "DemoCust Tasks"
+-  version = "1.0.0"
++  name = "Clouderized Tasks"
++  version = "1.1.0"
+   theme {
+-    background = "#0F766E"
++    background = "#1E40AF"
+     font = "DM Sans"
+-    fontSize = "16px"
++    fontSize = "18px"
+   }
+ }
+```
+
+This changes the header from **teal to blue**, bumps the version, and increases font size.
+
+### 3. Push the change
+
+```bash
+git add src/main/resources/site.conf
+git commit -m "Update theme to blue, bump to v1.1.0"
+git push
+```
+
+### 4. Watch the rebuild
+
+Go to Gitea Actions at `git.clouderized.com/cldrzd/demoapp/actions` and watch the pipeline:
+
+1. `sbt assembly` builds the fat JAR
+2. Docker builds the container image
+3. The old container is replaced with the new one
+
+### 5. See the result
+
+Refresh the browser. The page now shows:
+
+- **Blue header** instead of teal
+- Version **v1.1.0** in the top-right
+- Larger font size
+
+### 6. Reset for the next demo
+
+```bash
+git revert HEAD --no-edit
+git push
+```
+
+The app rebuilds and returns to its original teal theme at v1.0.0.
+
+## Config Reference
+
+All visual changes are driven by `src/main/resources/site.conf`:
+
+| Key | Default | What it controls |
+|-----|---------|-----------------|
+| `app.name` | `"DemoCust Tasks"` | Header title |
+| `app.version` | `"1.0.0"` | Version badge in header |
+| `app.theme.background` | `"#0F766E"` (teal) | Header and button color |
+| `app.theme.font` | `"DM Sans"` | Body font family |
+| `app.theme.fontSize` | `"16px"` | Base font size |
+
+## Suggested color swaps for demos
+
+| Color | Hex | Effect |
+|-------|-----|--------|
+| Teal (default) | `#0F766E` | Clouderized brand color |
+| Blue | `#1E40AF` | Obvious visual change |
+| Purple | `#7C3AED` | Another clear contrast |
+| Red | `#DC2626` | High-contrast demo |
+
+## Endpoints
+
+| Method | Path | Description |
+|--------|------|-------------|
+| GET | `/` | Task list (HTML) |
+| GET | `/health` | Health check (JSON) |
+| POST | `/tasks` | Create task (form) |
+| POST | `/tasks/:id/toggle` | Toggle completion |
+| POST | `/tasks/:id/delete` | Delete task |
+
+## Notes
+
+- Task storage is **in-memory** — it resets on every redeploy, which keeps the demo clean.
+- The app runs on the **Pro tier** (2GB RAM, 2 vCPU) since JVM needs the headroom.
+- Three sample tasks are pre-seeded on startup.

build.sbt

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+val scala3Version = "3.7.1"
+val thoriumVersion = "0.11.39"
+
+lazy val root = project
+  .in(file("."))
+  .settings(
+    name := "demoapp",
+    version := "0.1.0",
+    scalaVersion := scala3Version,
+    libraryDependencies ++= Seq(
+      "io.github.nicoburniske" %% "thorium" % thoriumVersion,
+      "com.typesafe" % "config" % "1.4.3",
+      "ch.qos.logback" % "logback-classic" % "1.5.6"
+    ),
+    assembly / mainClass := Some("Main"),
+    assembly / assemblyJarName := "demoapp.jar",
+    assembly / assemblyMergeStrategy := {
+      case PathList("META-INF", xs @ _*) =>
+        xs match {
+          case "MANIFEST.MF" :: Nil => MergeStrategy.discard
+          case "services" :: _      => MergeStrategy.concat
+          case _                    => MergeStrategy.discard
+        }
+      case "reference.conf" => MergeStrategy.concat
+      case x if x.endsWith(".conf") => MergeStrategy.concat
+      case _ => MergeStrategy.first
+    }
+  )

clouderized.yaml

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+name: demoapp
+tier: pro
+port: 8080
+healthcheck: /health
+jvm_opts: "-XX:MaxRAMPercentage=75.0 -XX:+UseSerialGC"

project/build.properties

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+sbt.version=1.10.7

project/plugins.sbt

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+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.3.0")

src/main/resources/logback.xml

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+<configuration>
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+    </encoder>
+  </appender>
+  <root level="INFO">
+    <appender-ref ref="STDOUT" />
+  </root>
+</configuration>

src/main/resources/site.conf

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+app {
+  name = "DemoCust Tasks"
+  version = "1.0.0"
+  theme {
+    background = "#0F766E"
+    font = "DM Sans"
+    fontSize = "16px"
+  }
+}

src/main/scala/Main.scala

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+import com.sun.net.httpserver.{HttpExchange, HttpServer}
+import java.net.InetSocketAddress
+import java.net.URLDecoder
+import java.nio.charset.StandardCharsets
+
+object Main:
+
+  def main(args: Array[String]): Unit =
+    val port = sys.env.getOrElse("PORT", "8080").toInt
+    val server = HttpServer.create(InetSocketAddress(port), 0)
+
+    server.createContext("/health", exchange => {
+      val response = """{"status":"ok"}"""
+      exchange.getResponseHeaders.set("Content-Type", "application/json")
+      exchange.sendResponseHeaders(200, response.getBytes.length)
+      val os = exchange.getResponseBody
+      os.write(response.getBytes)
+      os.close()
+    })
+
+    server.createContext("/tasks", exchange => {
+      val method = exchange.getRequestMethod
+      val path = exchange.getRequestURI.getPath
+
+      (method, path) match
+        case ("POST", "/tasks") =>
+          val body = String(exchange.getRequestBody.readAllBytes(), StandardCharsets.UTF_8)
+          val title = parseFormField(body, "title")
+          TaskController.createTask(title)
+          redirect(exchange, "/")
+
+        case ("POST", p) if p.endsWith("/toggle") =>
+          val id = p.stripPrefix("/tasks/").stripSuffix("/toggle")
+          TaskController.toggleTask(id)
+          redirect(exchange, "/")
+
+        case ("POST", p) if p.endsWith("/delete") =>
+          val id = p.stripPrefix("/tasks/").stripSuffix("/delete")
+          TaskController.deleteTask(id)
+          redirect(exchange, "/")
+
+        case _ =>
+          exchange.sendResponseHeaders(404, -1)
+          exchange.close()
+    })
+
+    server.createContext("/", exchange => {
+      val path = exchange.getRequestURI.getPath
+      if path == "/" || path.isEmpty then
+        val html = renderPage()
+        exchange.getResponseHeaders.set("Content-Type", "text/html; charset=utf-8")
+        exchange.sendResponseHeaders(200, html.getBytes(StandardCharsets.UTF_8).length)
+        val os = exchange.getResponseBody
+        os.write(html.getBytes(StandardCharsets.UTF_8))
+        os.close()
+      else
+        exchange.sendResponseHeaders(404, -1)
+        exchange.close()
+    })
+
+    server.setExecutor(null)
+    server.start()
+    println(s"demoapp started on port $port")
+    println(s"  app: ${SiteConfig.appName} v${SiteConfig.appVersion}")
+
+  private def redirect(exchange: HttpExchange, location: String): Unit =
+    exchange.getResponseHeaders.set("Location", location)
+    exchange.sendResponseHeaders(303, -1)
+    exchange.close()
+
+  private def parseFormField(body: String, field: String): String =
+    body.split("&").map(_.split("=", 2)).collectFirst {
+      case Array(k, v) if k == field =>
+        URLDecoder.decode(v, StandardCharsets.UTF_8)
+    }.getOrElse("")
+
+  private def esc(s: String): String =
+    s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
+      .replace("\"", "&quot;").replace("'", "&#39;")
+
+  private def renderPage(): String =
+    val cfg = SiteConfig
+    val tasks = TaskStore.all()
+    val totalCount = tasks.size
+    val doneCount = tasks.count(_.completed)
+
+    val taskRows = tasks.map { t =>
+      val checkedClass = if t.completed then "line-through text-gray-400" else ""
+      val checkIcon = if t.completed then "&#10003;" else ""
+      s"""
+      <div class="flex items-center gap-3 p-3 rounded-lg hover:bg-gray-50 group transition-colors">
+        <form method="POST" action="/tasks/${t.id}/toggle" class="flex-none">
+          <button type="submit"
+            class="w-6 h-6 rounded-full border-2 ${if t.completed then "bg-emerald-500 border-emerald-500 text-white" else "border-gray-300 hover:border-teal-500"} flex items-center justify-center text-xs transition-colors">
+            $checkIcon
+          </button>
+        </form>
+        <span class="flex-1 $checkedClass">${esc(t.title)}</span>
+        <form method="POST" action="/tasks/${t.id}/delete" class="flex-none opacity-0 group-hover:opacity-100 transition-opacity">
+          <button type="submit" class="text-red-400 hover:text-red-600 text-sm px-2 py-1 rounded hover:bg-red-50 transition-colors">
+            Delete
+          </button>
+        </form>
+      </div>"""
+    }.mkString("\n")
+
+    s"""<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>${esc(cfg.appName)}</title>
+  <script src="https://cdn.tailwindcss.com"></script>
+  <link href="https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=DM+Sans:wght@400;500;700&display=swap" rel="stylesheet">
+  <style>
+    body { font-family: '${cfg.font}', sans-serif; font-size: ${cfg.fontSize}; }
+  </style>
+</head>
+<body class="bg-gray-50 min-h-screen">
+  <header style="background-color: ${cfg.bgColor};" class="shadow-lg">
+    <div class="max-w-2xl mx-auto px-6 py-5 flex items-center justify-between">
+      <h1 class="text-white text-2xl font-bold" style="font-family: 'Instrument Serif', serif;">
+        ${esc(cfg.appName)}
+      </h1>
+      <span class="text-white/70 text-sm font-mono">v${esc(cfg.appVersion)}</span>
+    </div>
+  </header>
+
+  <main class="max-w-2xl mx-auto px-6 py-8">
+    <div class="bg-white rounded-xl shadow-md p-6 mb-6">
+      <div class="flex items-center justify-between mb-4">
+        <h2 class="text-lg font-semibold text-gray-800">Tasks</h2>
+        <span class="text-sm text-gray-500">$doneCount / $totalCount completed</span>
+      </div>
+
+      <div class="space-y-1">
+        $taskRows
+        ${if tasks.isEmpty then """<p class="text-gray-400 text-center py-8">No tasks yet. Add one below!</p>""" else ""}
+      </div>
+    </div>
+
+    <div class="bg-white rounded-xl shadow-md p-6">
+      <h2 class="text-lg font-semibold text-gray-800 mb-4">Add Task</h2>
+      <form method="POST" action="/tasks" class="flex gap-3">
+        <input type="text" name="title" placeholder="What needs to be done?"
+          required
+          class="flex-1 border-2 border-gray-200 rounded-lg px-4 py-2 focus:border-teal-600 focus:ring-2 focus:ring-teal-600/10 outline-none transition-colors"
+          style="border-color: #E2E8F0;">
+        <button type="submit"
+          class="px-6 py-2 rounded-lg text-white font-medium hover:-translate-y-0.5 hover:shadow-lg transition-all duration-300"
+          style="background-color: ${cfg.bgColor};">
+          Add
+        </button>
+      </form>
+    </div>
+
+    <footer class="text-center text-gray-400 text-xs mt-8">
+      Powered by <span class="font-semibold">Clouderized</span> &middot; Thorium/Scala
+    </footer>
+  </main>
+</body>
+</html>"""

src/main/scala/SiteConfig.scala

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+import com.typesafe.config.ConfigFactory
+
+object SiteConfig:
+  private val config = ConfigFactory.load("site")
+
+  val appName: String    = config.getString("app.name")
+  val appVersion: String = config.getString("app.version")
+  val bgColor: String    = config.getString("app.theme.background")
+  val font: String       = config.getString("app.theme.font")
+  val fontSize: String   = config.getString("app.theme.fontSize")

src/main/scala/TaskController.scala

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+import java.util.UUID
+
+object TaskController:
+
+  def createTask(title: String): Unit =
+    if title.trim.nonEmpty then TaskStore.add(title)
+
+  def toggleTask(id: String): Unit =
+    try TaskStore.toggle(UUID.fromString(id))
+    catch case _: IllegalArgumentException => ()
+
+  def deleteTask(id: String): Unit =
+    try TaskStore.delete(UUID.fromString(id))
+    catch case _: IllegalArgumentException => ()

src/main/scala/TaskStore.scala

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+import java.util.UUID
+import java.util.concurrent.ConcurrentHashMap
+import scala.jdk.CollectionConverters.*
+
+case class Task(id: UUID, title: String, completed: Boolean)
+
+object TaskStore:
+  private val tasks = ConcurrentHashMap[UUID, Task]()
+
+  // Pre-seed sample tasks
+  locally {
+    val samples = List(
+      "Deploy Scala app to Clouderized",
+      "Set up CI/CD with Gitea Actions",
+      "Configure custom domain"
+    )
+    samples.foreach { title =>
+      val id = UUID.randomUUID()
+      tasks.put(id, Task(id, title, false))
+    }
+  }
+
+  def all(): List[Task] =
+    tasks.values().asScala.toList.sortBy(_.title)
+
+  def add(title: String): Task =
+    val id = UUID.randomUUID()
+    val task = Task(id, title.trim, false)
+    tasks.put(id, task)
+    task
+
+  def toggle(id: UUID): Unit =
+    Option(tasks.get(id)).foreach { task =>
+      tasks.put(id, task.copy(completed = !task.completed))
+    }
+
+  def delete(id: UUID): Unit =
+    tasks.remove(id)
+
+  def get(id: UUID): Option[Task] =
+    Option(tasks.get(id))