Update README.md

Added Docker and fixed smaller issues

README.md

@@ -1,12 +1,12 @@
 # Event Store Certificate Generation CLI
 
-The command line interface to ease the generation of a certificate authority and node certificates for Event Store Db 20.6.x and above.
+The command line interface to ease the generation of a certificate authority and node certificates for EventStoreDB 20.6.x and above.
 
 ## Getting Started
 
 ### Releases
-The latest release for the ESGenCert CLI can be found under the [github releases page](https://github.com/EventStore/es-gencert-cli/releases).
-We releases binaries for Windows/ Linux and MacOS.
+The latest release for the es-gencert-cli can be found under the [GitHub releases page](https://github.com/EventStore/es-gencert-cli/releases).
+We releases binaries for Windows, Linux and macOS. We also publish the tool as a Docker image.
 
 ### Usage
 
@@ -15,12 +15,14 @@ Basic usage for es-gencert-cli:
 ./es-gencert-cli [options] <command> [args]
 ```
 
-Getting help for a specific command
-```
+Getting help for a specific command:
+
+```bash
 ./es-gencert-cli -help <command>
 ```
 e.g.
-```
+
+```bash
 ./es-gencert-cli -help create-ca
 
 Usage: create_ca [options]
@@ -30,17 +32,30 @@ Options:
   -out                        The output directory (default: ./ca)
 ```
 
-### Examples
-Generating a certificate authority
+## Running with Docker
+
+You could also run the tool using Docker interactive container:
+
+```bash
+docker run --rm -i eventstore/es-gencert-cli <command> <options>
 ```
-.\es-gencert-cli create-ca -out .\es-ca
+
+One useful scenarion is to use the tool inside the Docker Compose file to generate all the necessary certificates before starting cluster nodes. You can find an [example](https://github.com/EventStore/EventStore/blob/master/docker-compose.yml) in the EventStoreDB repository.
+
+### Examples
+
+Generating a certificate authority:
+
+```bash
+./es-gencert-cli create-ca -out ./es-ca
 ```
 
-Generating a certificate for an Event Store Db node
+Generating a certificate for an EventStoreDB node:
+
 ```
-.\es-gencert-cli-cli.exe create-node -ca-certificate .\es-ca\ca.crt -ca-key .\es-ca\ca.key -out .\node1 -ip-addresses 127.0.0.1,172.20.240.1 -dns-names eventstore-node1.localhost.com
+./es-gencert-cli-cli create-node -ca-certificate ./es-ca/ca.crt -ca-key ./es-ca/ca.key -out ./node1 -ip-addresses 127.0.0.1,172.20.240.1 -dns-names eventstore-node1.localhost.com
 ```
 
 ## Development
 
-Building or working on `es-gencert-cli` requires a Go environment, version 1.14 or higher.
+Building or working on `es-gencert-cli` requires a Go environment, version 1.14 or higher.