Merge pull request #84 from scribd/maksimt/SERF-2713/go-1.20.6

[SERF-2713] Upgrade go version to `v1.20.6`

Author: Neurostep

Dockerfile

@@ -2,7 +2,7 @@
 # build stage
 # =============================================================================
 
-FROM golang:1.20.5-alpine AS builder
+FROM golang:1.20.6-alpine AS builder
 
 WORKDIR /sdk
 

README.md

@@ -56,7 +56,7 @@ SDK, the Go version.
 
 ## Prerequisites
 
-* [Go](https://golang.org) (version `1.20.5`).
+* [Go](https://golang.org) (version `1.20.6`).
 * [Docker](https://www.docker.com/) (version `19.03.2`).
 
 ## SDK functionality
@@ -1417,7 +1417,7 @@ You can enter the docker environment to build, run and debug your service:
 ```
 $ docker-compose run --rm sdk /bin/bash
 root@1f31fa8e5c49:/sdk# go version
-go version go1.20.5 linux/amd64
+go version go1.20.6 linux/amd64
 ```
 
 Refer to the