fix: use mautrix[encryption] instead of matrix-nio for Matrix bridge

The Hermes Matrix gateway uses the mautrix SDK, not matrix-nio.
This fixes E2EE support by installing the correct library.

Refs: PR #2

ai/compose.yml

@@ -26,13 +26,14 @@ services:
       - "traefik.http.routers.webui-https.tls.certresolver=njalla"
 
   hermes:
-    build:
-      context: ./hermes
-      dockerfile: Dockerfile
+    image: nousresearch/hermes-agent:latest
     container_name: hermes
     restart: always
     # Gateway run enables the internal API server on port 8642
-    command: gateway run
+    # Install openai and mautrix[encryption] for Matrix bridge with E2EE support on startup
+    # Uses uv (modern Python package manager) with --system flag for venv installation
+    entrypoint: >
+      sh -c "/opt/hermes/.venv/bin/uv pip install openai mautrix[encryption] --system -q && /opt/hermes/.venv/bin/hermes gateway run"
     environment:
       - OLLAMA_HOST=http://ollama:11434
       - API_SERVER_ENABLED=true
@@ -43,6 +44,7 @@ services:
       - OPENROUTER_API_KEY=${OPENROUTER_API_KEY}
     volumes:
       - /mnt/HoardingCow_docker_data/Hermes/data:/opt/data
+      - /mnt/HoardingCow_docker_data/Hermes/venv:/opt/hermes/.venv
     devices:
       - /dev/kfd:/dev/kfd
       - /dev/dri:/dev/dri

ai/hermes/Dockerfile

@@ -1,10 +0,0 @@
-FROM nousresearch/hermes-agent:latest
-
-# Install Chromium for browser tool
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    chromium \
-    && rm -rf /var/lib/apt/lists/* \
-    && apt-get clean
-
-# Set environment variable for Chromium path
-ENV CHROME_EXECUTABLE=/usr/bin/chromium