refactor: using Go's embed package

.dockerignore

@@ -0,0 +1,2 @@
+web/node_modules
+web/public/build

Dockerfile

@@ -15,6 +15,7 @@ RUN apk add --no-cache gcc musl-dev linux-headers
 WORKDIR /backend-build
 
 COPY . .
+COPY --from=frontend /frontend-build/public ./web/public
 
 RUN go build -o eth-faucet -ldflags "-w -s"
 
@@ -23,7 +24,6 @@ FROM alpine
 RUN apk add --no-cache ca-certificates
 WORKDIR /app
 
-COPY --from=frontend /frontend-build/public ./web/public
 COPY --from=backend /backend-build/eth-faucet .
 
 EXPOSE 8080

internal/server.go

@@ -11,6 +11,8 @@ import (
 	"github.com/julienschmidt/httprouter"
 	log "github.com/sirupsen/logrus"
 	"github.com/urfave/negroni"
+
+	"github.com/chainflag/eth-faucet/web"
 )
 
 type server struct {
@@ -27,11 +29,11 @@ func (s server) Run(port int) {
 	r.HandlerFunc("GET", "/api/info", s.infoHandler)
 
 	n := negroni.New(negroni.NewRecovery(), negroni.NewLogger())
-	n.Use(negroni.NewStatic(http.Dir("web/public")))
+	n.Use(negroni.NewStatic(web.Dist()))
 	n.UseHandler(r)
 
 	log.Infof("Starting http server %d", port)
-	http.ListenAndServe(":"+strconv.Itoa(port), n)
+	log.Fatal(http.ListenAndServe(":"+strconv.Itoa(port), n))
 }
 
 func (s server) claimHandler(w http.ResponseWriter, r *http.Request) {

web/embed.go

@@ -0,0 +1,19 @@
+package web
+
+import (
+	"embed"
+	"io/fs"
+	"net/http"
+)
+
+//go:embed public
+var static embed.FS
+
+func Dist() http.FileSystem {
+	fsys, err := fs.Sub(static, "public")
+	if err != nil {
+		panic(err)
+	}
+
+	return http.FS(fsys)
+}