Initial setup: Matrix Synapse + Element Web

- docker-compose.yml with Synapse, PostgreSQL 16, Element Web
- Element config pointing to chat.dshkabatur.ru
- .gitignore for data directories

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

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+synapse-data/
+postgres-data/
+*.log

docker-compose.yml

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+version: '2.4'
+
+services:
+  db:
+    image: postgres:16-alpine
+    container_name: matrix-db
+    restart: unless-stopped
+    volumes:
+      - ./postgres-data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_DB: synapse
+      POSTGRES_USER: synapse
+      POSTGRES_PASSWORD: SynapseDB_2026_secure
+      POSTGRES_INITDB_ARGS: "--encoding=UTF-8 --lc-collate=C --lc-ctype=C"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U synapse"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    networks:
+      - matrix
+
+  synapse:
+    image: matrixdotorg/synapse:latest
+    container_name: matrix-synapse
+    restart: unless-stopped
+    volumes:
+      - ./synapse-data:/data
+    ports:
+      - "127.0.0.1:8008:8008"
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      TZ: Europe/Moscow
+    networks:
+      - matrix
+
+  element:
+    image: vectorim/element-web:latest
+    container_name: matrix-element
+    restart: unless-stopped
+    volumes:
+      - ./element-config.json:/app/config.json:ro
+    ports:
+      - "127.0.0.1:3082:80"
+    networks:
+      - matrix
+
+networks:
+  matrix:
+    driver: bridge

element-config.json

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+{
+    "default_server_config": {
+        "m.homeserver": {
+            "base_url": "https://chat.dshkabatur.ru",
+            "server_name": "chat.dshkabatur.ru"
+        }
+    },
+    "brand": "Dshkabatur Chat",
+    "default_theme": "dark",
+    "room_directory": {
+        "servers": ["chat.dshkabatur.ru"]
+    },
+    "show_labs_settings": false,
+    "default_country_code": "RU",
+    "setting_defaults": {
+        "breadcrumbs": true
+    }
+}