Proof of concept: Container management with FastAPI backend

- FastAPI backend with REST API endpoints
- SQLite database for container metadata
- Docker/Podman SDK integration with label filtering
- Frontend: Server creation form and management page
- Container operations: create, list, start, stop, delete
- Single container deployment (nginx + Python + supervisor)
- Support for Docker and Podman (rootless)
- Volume management for persistent data

README.md

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+# Stronghold
+
+A web ui to manage minecraft server using the itzg docker container
+https://github.com/itzg/docker-minecraft-server
+
+Also manage proxy servers like velocity, bungeecord
+
+## Development
+See design.md for design notes
+
+## Quick Start (Proof of Concept)
+
+Stronghold is a web UI for managing Minecraft servers using Docker/Podman containers.
+
+### Running the POC
+
+**Using Docker Compose (Docker users)**
+```bash
+docker-compose up -d --build
+```
+
+**Using Podman Compose (Podman users)**
+```bash
+podman-compose up -d --build
+```
+
+**Note**: The container needs access to your Docker/Podman socket to manage containers. The compose file mounts:
+- `/var/run/docker.sock` (Docker)
+- `/run/podman/podman.sock` (Podman)
+
+Then open http://localhost:8080 in your browser.
+
+### Features
+
+**Current POC Features:**
+- ✅ Generate docker-compose.yml files
+- ✅ Create Minecraft server containers directly
+- ✅ List and manage containers
+- ✅ Start/Stop/Delete containers
+- ✅ Support for Docker and Podman
+- ✅ SQLite database for container metadata
+- ✅ Multiple server types (Vanilla, Paper, Forge, Fabric, etc.)
+- ✅ Modpack support (CurseForge, Modrinth, URL, Local)
+- ✅ Advanced configuration options
+
+**Pages:**
+- `/` (index.html) - Create new servers
+- `/manage.html` - Manage existing servers
+
+### Architecture
+
+- **Frontend**: Static HTML/CSS/JavaScript
+- **Backend**: Python FastAPI
+- **Database**: SQLite (stored in `./data/stronghold.db`)
+- **Container Engine**: Docker SDK (works with both Docker and Podman)
+
+All containers created by Stronghold are labeled with `stronghold.managed=true` to isolate them from other containers.