add modules, update go to 1.17

Dockerfile

@@ -1,5 +1,5 @@
 # build stage
-FROM golang:alpine AS build-env
+FROM golang:1.17-alpine AS build-env
 
 WORKDIR /go/src/github.com/mintance/nginx-clickhouse
 

go.mod

@@ -0,0 +1,22 @@
+module github.com/mintance/nginx-clickhouse
+
+go 1.17
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/fsnotify/fsnotify v1.5.1 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/mintance/go-clickhouse v1.0.2-0.20180104154718-75c62792649d // indirect
+	github.com/papertrail/go-tail v0.0.0-20180509224916-973c153b0431 // indirect
+	github.com/prometheus/client_golang v1.12.1 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.32.1 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/satyrius/gonx v1.3.1-0.20210630191304-422f42f8923b // indirect
+	github.com/sirupsen/logrus v1.8.1 // indirect
+	golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 // indirect
+	google.golang.org/protobuf v1.26.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)