feat: initialize frontend with React, Vite, and Tailwind CSS

- Added package.json for project dependencies and scripts.
- Configured PostCSS with Tailwind CSS.
- Created main application structure with App component and routing.
- Implemented API client for handling requests with Axios.
- Developed authentication API for login, logout, and user verification.
- Created entities API for managing virtual entities.
- Implemented logs API for fetching dispatch logs.
- Added navigation bar component for app navigation.
- Created protected route component for route guarding.
- Set up global CSS with Tailwind directives.
- Configured main entry point for React application.
- Developed basic Dashboard and Login pages.
- Set up router for application navigation.
- Added Jest testing setup for testing library.
- Configured Tailwind CSS with content paths.
- Set TypeScript configuration for frontend.
- Created Vite configuration for development and production builds.
- Added Nginx configuration for serving the application and proxying API requests.

backend/Dockerfile

@@ -0,0 +1,17 @@
+# ── Stage 1: Build ───────────────────────────────────────────────────────────
+FROM gradle:8-jdk21-alpine AS build
+WORKDIR /app
+COPY build.gradle.kts settings.gradle.kts ./
+COPY gradle gradle
+COPY gradlew ./
+# Download dependencies first (layer cache)
+RUN ./gradlew dependencies --no-daemon || true
+COPY src src
+RUN ./gradlew bootJar --no-daemon
+
+# ── Stage 2: Runtime ─────────────────────────────────────────────────────────
+FROM eclipse-temurin:21-jre-alpine AS runtime
+WORKDIR /app
+COPY --from=build /app/build/libs/*.jar app.jar
+EXPOSE 8080
+ENTRYPOINT ["java", "-jar", "app.jar"]