Initial commit: EifelDC - Discord-like Matrix chat platform

Includes server (Rust/Axum API proxy with voice management),
Tauri desktop client with Svelte UI, bot-sdk, Docker infra
(Synapse, PostgreSQL, Coturn, Nginx), and CI/CD pipeline.

.dockerignore

@@ -0,0 +1,28 @@
+target/
+node_modules/
+dist/
+.svelte-kit/
+*.log
+*.pid
+.env
+.env.*
+!.env.example
+*.swp
+*.swo
+*~
+.DS_Store
+.git/
+.github/
+synapse-data/
+synapse-venv/
+*.pem
+*.key
+*.crt
+*.db
+*.db-journal
+*.db-wal
+venv/
+__pycache__/
+*.pyc
+.cargo/
+infra/