serve swagger static files as part of go binary

Makefile

@@ -46,6 +46,8 @@ protoc:
 	--grpc-gateway_out=pb --grpc-gateway_opt paths=source_relative \
 	--openapiv2_out=doc/swagger --openapiv2_opt=allow_merge=true,merge_file_name=eenergy \
     proto/*.proto
+	statik -src=./doc/swagger -dest=./doc
+
 
 evans:
 	evans --host localhost --port 9090 -r repl

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.18.1
 	github.com/jackc/pgx/v5 v5.5.1
 	github.com/o1egl/paseto v1.0.0
+	github.com/rakyll/statik v0.1.7
 	github.com/spf13/viper v1.18.2
 	github.com/stretchr/testify v1.8.4
 	go.uber.org/mock v0.4.0

go.sum

@@ -206,6 +206,8 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rakyll/statik v0.1.7 h1:OF3QCZUuyPxuGEP7B4ypUa7sB/iHtqOTDYZXGM8KOdQ=
+github.com/rakyll/statik v0.1.7/go.mod h1:AlZONWzMtEnMs7W4e/1LURLiI49pIMmp6V9Unghqrcc=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
 github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=

main.go

@@ -10,12 +10,15 @@ import (
 	"os"
 
 	db "github.com/aradwann/eenergy/db/store"
+	_ "github.com/aradwann/eenergy/doc/statik"
 	"github.com/aradwann/eenergy/gapi"
 	"github.com/aradwann/eenergy/pb"
 	"github.com/aradwann/eenergy/util"
 	_ "github.com/golang-migrate/migrate/v4/source/file"
 	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
 	_ "github.com/jackc/pgx/v5/stdlib"
+	"github.com/rakyll/statik/fs"
+
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/reflection"
 	"google.golang.org/protobuf/encoding/protojson"
@@ -94,8 +97,12 @@ func runGatewayServer(config util.Config, store db.Store) {
 	mux := http.NewServeMux()
 	mux.Handle("/", grpcMux)
 
-	fs := http.FileServer(http.Dir("./doc/swagger"))
-	mux.Handle("/swagger/", http.StripPrefix("/swagger/", fs))
+	statikFs, err := fs.New()
+	if err != nil {
+		log.Fatalf("cannot create statik fs: %s", err)
+	}
+	swaggerHandler := http.StripPrefix("/swagger/", http.FileServer(statikFs))
+	mux.Handle("/swagger/", swaggerHandler)
 
 	listener, err := net.Listen("tcp", config.HTTPServerAddress)
 	if err != nil {