package main

import (
    "log"
    "golang.org/x/net/context"
    firebase "firebase.google.com/go"
    "google.golang.org/api/option"
    "github.com/gorilla/mux"
    "net/http"
    "time"
)

func main() {
    port := ":5000"
    rtr := mux.NewRouter()

    sa := option.WithCredentialsFile("./credfile.json")
    ctx := context.Background()
    app, err := firebase.NewApp(ctx, nil, sa)
    if err != nil {
        log.Fatalf("error initializing app: %vn", err)
    }

    client, err := app.Firestore(ctx)
    if err != nil {
        log.Fatalln(err)
    }
    defer client.Close()

    server := &http.Server{
        Addr: port,
        Handler: rtr,
        ReadTimeout: 5 * time.Second,
        WriteTimeout: 10 * time.Second,
    }

    log.Fatal(server.ListenAndServe())
}

../../../../go/src/golang.org/x/oauth2/google/default.go:20:2: code in directory /Users/username/go/src/google.golang.org/cloud/compute/metadata expects import "cloud.google.com/go/compute/metadata"