Upgrade repo to Go 1.18 (#41)

* Upgrade repo to Go 1.18

Author: Saied Kazemi

.travis.yml

@@ -1,15 +1,11 @@
 language: go
 
 go:
-- '1.14'
+- 1.18
 
-# Unconditionally place the repo at GOPATH/src/${go_import_path} to support
-# forks.
-go_import_path: github.com/m-lab/prometheus-bigquery-exporter
-
-
-before_install:
-- go get github.com/mattn/goveralls
+install:
+- go get -v -t ./...
+- go install github.com/mattn/goveralls@latest
 
 script:
 # Run query "unit tests".

Dockerfile

@@ -1,7 +1,7 @@
-FROM golang:alpine3.15 as builder
+FROM golang:1.18 as builder
 ADD . /go/src/github.com/m-lab/prometheus-bigquery-exporter
 WORKDIR /go/src/github.com/m-lab/prometheus-bigquery-exporter
-RUN apk add gcc libc-dev git
+ENV CGO_ENABLED 0
 RUN go vet && \
     go get -t . && \
     go install .