Use golang-1.17

Dockerfile fails with golang-1.18. It needs git until [1] is fixed.
There are two options to fix it:

1. use 1.17 until -buildvcs=auto is added
2. add -buildvcs=false

This PR uses the first option.

[1]: golang/go#51798

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine AS builder
+FROM golang:1.17-alpine AS builder
 WORKDIR /app
 ADD . .
 RUN go install -v .