fix: address CodeRabbit review issues

- redis-handler: add TLS_CA and USERNAME env support matching core client
- connection.ts: fix Boolean() truthy bug (CI="false" was disabling Redis)
- channel.ts: add in-memory lock for single-instance fallback mode
- channel-subscription-tracker: lazy-init subscriber client
- board.ts: invalidate user cache on board delete for home-board users
- .env.example: document REDIS_CACHE_DB vs DATABASE_INDEX collision risk
- CLI docs: fix docker exec command (remove /bin/bash prefix)
- Docker docs: fix docker rm -f and docker ps -a for stopped containers

apps/docs/docs/advanced/command-line/index.mdx

@@ -13,7 +13,7 @@ You should also create a backup of the database, in case you break something.
 ## Execute CLI with Docker
 
 1. Execute ``docker ps | grep homarr`` on the root system with Docker to find the container ID of your Homarr container.
-2. Run ``docker exec -it <container-id> /bin/bash homarr <your-command-goes-here>``. \
+2. Run ``docker exec -it <container-id> homarr <your-command-goes-here>``. \
 Replace ``<container-id>`` with your container ID from step 1. \
 Replace ``<your-command-goes-here>`` with the command you want to execute (see sub-pages).
 

apps/docs/docs/getting-started/installation/docker.mdx

@@ -84,7 +84,7 @@ Docker will mount the configuration files and icons to your host machine. Please
 ### Updating
 To update Homarr, you must remove your container first. Make sure that you've mounted your data and that you have access to it, so your configuration doesn't get lost.
 
-1. Run ``docker rm homarr`` to remove the container.
+1. Run ``docker rm -f homarr`` to stop and remove the container.
 2. Pull the latest Homarr image ``docker pull ghcr.io/homarr-labs/homarr:latest``.
 3. Re-run the command you used to install Homarr.
 
@@ -98,8 +98,8 @@ Want to update all your containers automatically? Checkout [Watchtower](https://
 
 ### Uninstalling
 
-1. Obtain the container ID of your Homarr container using ``docker ps | grep homarr``.
-2. Delete the container using ``docker rm <your-container-id>``
+1. Obtain the container ID of your Homarr container using ``docker ps -a | grep homarr``.
+2. Delete the container using ``docker rm -f <your-container-id>``
 3. Prune unused Docker images using ``docker image prune`` (*Warning: this also removes you other unused images - not just Homarr*)
 4. (Optional): Prune any network or volumes if you use any.
 5. (Optional): Remove Homarr from your reverse proxy, VPNs or tunnels if you use any.