Add deploy tooling, docs, and Aspire config

deploy/README.md

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+## Build and Push Images
+
+1. Copy `.env.example` to `.env` and fill in production values.
+2. Run the Aspire-native push pipeline:
+
+```powershell
+.\deploy\push-images.ps1
+```
+
+Or from a POSIX shell:
+
+```sh
+sh ./deploy/push-images.sh
+```
+
+The shell script expects the Aspire CLI to be installed in that shell. In WSL, install it with the official Aspire installer:
+
+```sh
+curl -sSL https://aspire.dev/install.sh | bash
+```
+
+Or as a .NET tool:
+
+```sh
+dotnet tool install -g Aspire.Cli
+```
+
+The script loads `deploy/.env` when it exists, authenticates to `git.recroomarchive.org` using `REGISTRY_USERNAME` and `REGISTRY_TOKEN`, then runs `aspire do push`.
+
+The included `docker-compose.yml` consumes the pushed images:
+
+```powershell
+docker compose --env-file .env up -d
+```