Bump up GO to 1.21 (#40)

Dockerfile

@@ -3,14 +3,14 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-FROM golang:1.18.0-stretch AS sim
+FROM golang:1.21.6-bookworm AS sim
 
 LABEL maintainer="ONF <omec-dev@opennetworking.org>"
 
 RUN apt-get update && apt-get -y install vim
 RUN cd $GOPATH/src && mkdir -p simapp
 COPY . $GOPATH/src/simapp
-RUN cd $GOPATH/src/simapp && go install 
+RUN cd $GOPATH/src/simapp && go install
 
 FROM alpine:3.16 AS simapp
 

go.mod

@@ -1,6 +1,6 @@
 module simapp
 
-go 1.15
+go 1.21
 
 require (
 	github.com/fsnotify/fsnotify v1.4.9
@@ -9,3 +9,34 @@ require (
 	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4
 	gopkg.in/yaml.v2 v2.4.0
 )
+
+require (
+	github.com/asaskevich/govalidator v0.0.0-20200907205600-7a23bdc65eef // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/gin-gonic/gin v1.7.0 // indirect
+	github.com/go-playground/locales v0.13.0 // indirect
+	github.com/go-playground/universal-translator v0.17.0 // indirect
+	github.com/go-playground/validator/v10 v10.4.1 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.11 // indirect
+	github.com/leodido/go-urn v1.2.0 // indirect
+	github.com/magiconair/properties v1.8.5 // indirect
+	github.com/mattn/go-isatty v0.0.12 // indirect
+	github.com/mitchellh/mapstructure v1.4.1 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
+	github.com/pelletier/go-toml v1.9.3 // indirect
+	github.com/sirupsen/logrus v1.7.0 // indirect
+	github.com/spf13/afero v1.6.0 // indirect
+	github.com/spf13/cast v1.3.1 // indirect
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/subosito/gotenv v1.2.0 // indirect
+	github.com/ugorji/go/codec v1.2.1 // indirect
+	golang.org/x/crypto v0.0.0-20201208171446-5f87f3452ae9 // indirect
+	golang.org/x/sys v0.0.0-20210510120138-977fb7262007 // indirect
+	golang.org/x/text v0.3.5 // indirect
+	google.golang.org/protobuf v1.26.0 // indirect
+	gopkg.in/ini.v1 v1.62.0 // indirect
+)

go.sum

@@ -259,7 +259,6 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s=
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
 github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
-github.com/ugorji/go v1.2.1 h1:dz+JxTe7GZQdErTo7SREc1jQj/hFP1k7jyIAwODoW+k=
 github.com/ugorji/go v1.2.1/go.mod h1:cSVypSfTLm2o9fKxXvQgn3rMmkPXovcWor6Qn5tbFmI=
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 github.com/ugorji/go/codec v1.2.1 h1:/TRfW3XKkvWvmAYyCUaQlhoCDGjcvNR8xVVA/l5p/jQ=