fix: derive binary name from argv and add latest Docker tag on release

.github/workflows/release.yml

@@ -42,6 +42,7 @@ jobs:
             type=ref,event=pr
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable=${{ github.event_name == 'release' }}
       - # https://github.com/actions/cache
         name: Cache Docker layers
         uses: actions/cache@v4

cmd/serve.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"path/filepath"
 
 	"github.com/Maronato/go-finger/internal/config"
 	"github.com/Maronato/go-finger/internal/fingerreader"
@@ -12,7 +13,7 @@ import (
 	"github.com/peterbourgon/ff/v4"
 )
 
-const appName = "finger"
+var appName = filepath.Base(os.Args[0])
 
 func newServerCmd(cfg *config.Config) *ff.Command {
 	return &ff.Command{