Update docker install readme

docs/DOCKER_INSTALL.md

@@ -4,11 +4,8 @@
 
 - [Docker engine download &
    install](https://docs.docker.com/engine/install/)
-- [Docker compose download &
-   install](https://docs.docker.com/compose/install/)
 
 ### Set up the boltcard server
-- Run `chmod +x docker_init.sh`
 - Run `./docker_init.sh` to set up the initial data
 - Put the `tls.cert` file and `admin.macaroon` files in the project root directory
 
@@ -21,20 +18,32 @@ set up the server hosting firewall to allow open access to https (port 443) only
 
 ### service bring-up and running
 ```
+$ sudo groupadd docker
+$ sudo usermod -aG docker ${USER}
+(log out & in again)
 $ docker volume create caddy_data
-// add -d for detached mode
-$ docker-compose up -d
+// add -d option for detached mode
+$ docker compose up
 ```
 
 ### stop docker
 ```
-$ docker-compose down
+$ docker compose down
 ```
 To delete the database and reset the docker volume, run `docker-compose down --volumes`
 *NOTE:  caddy_data volume won't be removed even if you run `docker-compose down --volumes` because it's an external volume.*  
 
+### check container logs
+
+- [Docker Logs](https://docs.docker.com/engine/reference/commandline/logs/)
+
+```
+$ docker logs [OPTIONS] CONTAINER
+```
+
+Run `$ docker ps` to list containers and get container names/ids
 
 #### running create bolt card command
 -  `docker exec boltcard_main createboltcard/createboltcard`  to see options
--  `docker exec boltcard_main createboltcard/createboltcard -enable -tx_max=1000 -day_max=10000 -name=card_1`  for example
+-  `docker exec boltcard_main createboltcard/createboltcard -enable -allow_neg_bal -tx_max=1000 -day_max=10000 -name=card_1`  for example
 -  this will give you a one-time link in text and QR code form