Specify versions

README.md

@@ -24,15 +24,14 @@ First, clone this repo where you would like to run your node.
 ### Building electrs
 
 Since there is no good `electrs` docker image out there, we roll our own one
-for this project. The file is `electrs-docker/Dockerfile`. To build the image, run the
-following command:
+for this project. The file is `electrs-docker/Dockerfile`. To build the image,
+run the following command:
 
 ```bash
 cd electrs-docker
 docker build -t my-electrs:latest -f Dockerfile . 
 ```
 
-
 ### Environment and configuration files
 
 Now, you need to build a `.env` file. You can start by making a copy of
@@ -51,9 +50,8 @@ not make any changes if you are following these instructions.
 
 Inside `data/lnbits`, you will need to place a `.env` file. Pay attention: this
 file is specific for LNbits and is unrelated to the other `.env` file that sits
-on the root of this repo. The best place to get an example is [the official
-LNbits repository](https://github.com/lnbits/lnbits).
-
+on the root of this repo. The best place to get an example
+is [the official LNbits repository](https://github.com/lnbits/lnbits).
 
 ### Running and Smoke testing
 
@@ -73,11 +71,11 @@ different services:
 ## Upgrading versions of the different services
 
 - Bitcoin: upgrade in docker-compose.yaml.
-- electrs: specify tag in custom electrs dockerfile, build again.
+- electrs: specify tag in the `git checkout` command in the custom electrs
+  dockerfile, build again.
 - mempool: upgrade web, api and db in docker-compose.yaml.
 - LNbits: upgrade in docker-compose.yaml.
 
-
 ### How to backup data
 
 TODO: explain how to back all the data up with a rsync.