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.

Dockerfile.allinone

@@ -0,0 +1,58 @@
+# ── Stage 1: Build frontend ───────────────────────────────────────────────────
+FROM node:20-alpine AS frontend-build
+
+WORKDIR /app/frontend
+
+COPY frontend/package*.json ./
+RUN npm ci
+
+COPY frontend/ ./
+RUN npm run build
+
+# ── Stage 2: Build backend ────────────────────────────────────────────────────
+FROM gradle:8-jdk21-alpine AS backend-build
+
+WORKDIR /app/backend
+
+COPY backend/build.gradle.kts backend/settings.gradle.kts ./
+COPY backend/gradle ./gradle
+RUN gradle dependencies --no-daemon --quiet || true
+
+COPY backend/src ./src
+RUN gradle bootJar --no-daemon -x test
+
+# ── Stage 3: Final all-in-one image ───────────────────────────────────────────
+FROM ubuntu:24.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y \
+    nginx \
+    postgresql \
+    supervisor \
+    openjdk-21-jre-headless \
+    && rm -rf /var/lib/apt/lists/*
+
+# PostgreSQL data directory
+RUN mkdir -p /var/lib/postgresql/data && chown -R postgres:postgres /var/lib/postgresql
+
+# Copy frontend static files
+COPY --from=frontend-build /app/frontend/dist /usr/share/nginx/html
+
+# Copy backend JAR
+RUN mkdir -p /app
+COPY --from=backend-build /app/backend/build/libs/*.jar /app/app.jar
+
+# Copy Nginx config (internal — backend is on localhost:8080)
+COPY nginx/nginx.allinone.conf /etc/nginx/nginx.conf
+
+# Copy Supervisor config
+COPY docker/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+
+# Copy entrypoint
+COPY docker/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 80
+
+ENTRYPOINT ["/entrypoint.sh"]