Build container using x.y.z golang version

Won't work on older versions due to a change in toolchain and 'must match format 1.23' error

Dockerfile

@@ -1,28 +1,15 @@
 # Build the manager binary
 FROM quay.io/centos/centos:stream8 AS builder
-RUN dnf install -y golang jq git \
-    && dnf clean all -y
 
 WORKDIR /workspace
 # Copy the Go Modules manifests for detecting Go version
 COPY go.mod go.mod
 COPY go.sum go.sum
 
-RUN \
-    # get Go version from mod file
-    export GO_VERSION=$(grep -E "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") && \
-    echo ${GO_FILENAME} && \
-    # download and unpack
-    curl -sL -o go.tar.gz "https://golang.org/dl/${GO_FILENAME}" && \
-    tar -C /usr/local -xzf go.tar.gz && \
-    rm go.tar.gz
-
-# add Go directory to PATH
-ENV PATH="${PATH}:/usr/local/go/bin"
-RUN go version
+# Install Golang based on the version from go.mod
+RUN GO_VERSION=$(grep -E "go [[:digit:]]\.[[:digit:]][[:digit:]]" go.mod | awk '{print $2}') \
+    && dnf install golang-${GO_VERSION} git -y && go version \
+    && dnf clean all -y
 
 # Copy the go source
 COPY main.go main.go

go.mod

@@ -1,6 +1,6 @@
 module github.com/medik8s/fence-agents-remediation
 
-go 1.20
+go 1.21.7
 
 require (
 	github.com/go-logr/logr v1.4.1