feat(dendrite): add dendrite stack

compose/dendrite/.env.example

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+POSTGRES_DATA_PATH="../../volumes/dendrite/postgres"
+POSTGRES_PASSWORD="SUPER_SECRET_PASSWORD"
+DENDRITE_HTTP_PORT="8008"
+DENDRITE_HTTPS_PORT="8448"
+DENDRITE_CONFIG_PATH="../../volumes/dendrite/config"
+DENDRITE_MEDIA_PATH="../../volumes/dendrite/dendrite/media"
+DENDRITE_JETSTREAM_PATH="../../volumes/dendrite/dendrite/jetstream"
+DENDRITE_SEARCH_INDEX_PATH="../../volumes/dendrite/dendrite/search_index"

compose/dendrite/docker-compose.yml

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+services:
+  postgres:
+    hostname: postgres
+    image: postgres:15-alpine
+    restart: always
+    volumes:
+      - "${POSTGRES_DATA_PATH:?}:/var/lib/postgresql/data"
+    environment:
+      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD:?}"
+      POSTGRES_USER: dendrite
+      POSTGRES_DATABASE: dendrite
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U dendrite"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    networks:
+      - internal
+
+  monolith:
+    hostname: monolith
+    image: ghcr.io/element-hq/dendrite-monolith:latest
+    ports:
+      - "${DENDRITE_HTTP_PORT:-8008}:8008"
+      - "${DENDRITE_HTTPS_PORT:-8448}:8448"
+    volumes:
+      - "${DENDRITE_CONFIG_PATH:?}:/etc/dendrite"
+      - "${DENDRITE_MEDIA_PATH:?}:/var/dendrite/media"
+      - "${DENDRITE_JETSTREAM_PATH:?}:/var/dendrite/jetstream"
+      - "${DENDRITE_SEARCH_INDEX_PATH:?}:/var/dendrite/searchindex"
+    depends_on:
+      postgres:
+        condition: service_healthy
+    networks:
+      - internal
+    restart: unless-stopped
+
+networks:
+  internal:
+    attachable: true