Set Golang version for specifing the correct toolchain

Using this specific toolchain we set the minimum requirement for Golang version. 'go command uses its own bundled toolchain when that toolchain is at least as new as the go or toolchain lines in the main module'. https://go.dev/doc/toolchain

Author: razo7

Dockerfile

@@ -13,7 +13,7 @@ ENV GOTOOLCHAIN=auto
 # Ensure correct Go version
 RUN \
     # get Go version from mod file
-    export GO_VERSION=$(grep -E "go [[:digit:]]\.[[:digit:]][[:digit:]]" go.mod | awk '{print $2}') && \
+    export GO_VERSION=$(grep -oE "go [[:digit:]]\.[[:digit:]][[:digit:]]" go.mod | awk '{print $2}') && \
     echo ${GO_VERSION} && \
     # find filename for latest z version from Go download page
     export GO_FILENAME=$(curl -sL 'https://go.dev/dl/?mode=json&include=all' | jq -r "[.[] | select(.version | startswith(\"go${GO_VERSION}\"))][0].files[] | select(.os == \"linux\" and .arch == \"amd64\") | .filename") && \

go.mod

@@ -1,6 +1,6 @@
 module github.com/medik8s/self-node-remediation
 
-go 1.23
+go 1.23.0
 
 require (
 	github.com/go-logr/logr v1.4.2