Implement Cobra CLI tooling, Viper config tooling (#336)

* start pulling out + replacing urfave and config

* replace many many instances of config

* move more stuff => viper

* properly remove urfave

* move some flags to root command

* add testrig commands to root

* alias config file keys

* start adding cli parsing tests

* reorder viper init

* remove config path alias

* fmt

* change config file keys to non-nested

* we're more or less in business now

* tidy up the common func

* go fmt

* get tests passing again

* add note about the cliparsing tests

* reorganize

* update docs with changes

* structure cmd dir better

* rename + move some files around

* fix dangling comma

internal/federation/authenticate.go

@@ -29,11 +29,13 @@ import (
 	"strings"
 
 	"github.com/sirupsen/logrus"
+	"github.com/spf13/viper"
 
 	"github.com/go-fed/httpsig"
 	"github.com/superseriousbusiness/activity/pub"
 	"github.com/superseriousbusiness/activity/streams"
 	"github.com/superseriousbusiness/activity/streams/vocab"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/util"
@@ -155,7 +157,8 @@ func (f *federator) AuthenticateFederatedRequest(ctx context.Context, requestedU
 	requestingRemoteAccount := &gtsmodel.Account{}
 	requestingLocalAccount := &gtsmodel.Account{}
 	requestingHost := requestingPublicKeyID.Host
-	if strings.EqualFold(requestingHost, f.config.Host) {
+	host := viper.GetString(config.Keys.Host)
+	if strings.EqualFold(requestingHost, host) {
 		// LOCAL ACCOUNT REQUEST
 		// the request is coming from INSIDE THE HOUSE so skip the remote dereferencing
 		l.Tracef("proceeding without dereference for local public key %s", requestingPublicKeyID)