Archify Sync server, Dockerfile and Helm chart

Rust server (axum, yrs, sqlx/PostgreSQL): live shared models over the y-websocket protocol, versions, browser sign-in with PKCE, invites, single sign-on through OIDC, metrics. Docker image on distroless, compose file, and a Helm chart with one pod, optional bundled PostgreSQL and secrets from existing Secrets.

.dockerignore

@@ -0,0 +1,8 @@
+target
+node_modules
+packages
+charts
+.git
+.moon/cache
+.env
+*.log