Enable serving of static files

server.go

@@ -4,6 +4,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"flag"
 
 	"github.com/99designs/gqlgen/graphql/handler"
 	"github.com/99designs/gqlgen/graphql/playground"
@@ -15,15 +16,15 @@ import (
 	_ "github.com/mattn/go-sqlite3"
 )
 
-const defaultPort = "8080"
-
 func main() {
-	port := os.Getenv("PORT")
-	if port == "" {
-		port = defaultPort
-	}
+	var port, staticFiles, jobDBFile string
 
-	db, err := sqlx.Open("sqlite3", "./job.db")
+	flag.StringVar(&port, "port", "8080", "Port on which to listen")
+	flag.StringVar(&staticFiles, "static-files", "./frontend/public", "Directory who's contents shall be served as static files")
+	flag.StringVar(&jobDBFile, "job-db", "./job.db", "SQLite 3 Jobs Database File")
+	flag.Parse()
+
+	db, err := sqlx.Open("sqlite3", jobDBFile)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -31,11 +32,16 @@ func main() {
 
 	r := mux.NewRouter()
 	loggedRouter := handlers.LoggingHandler(os.Stdout, r)
+
 	srv := handler.NewDefaultServer(generated.NewExecutableSchema(generated.Config{Resolvers: &graph.Resolver{DB: db}}))
-	r.HandleFunc("/", playground.Handler("GraphQL playground", "/query"))
+	r.HandleFunc("/graphql-playground", playground.Handler("GraphQL playground", "/query"))
 	r.Handle("/query", srv)
 
-	log.Printf("connect to http://localhost:%s/ for GraphQL playground", port)
+	if len(staticFiles) != 0 {
+		r.PathPrefix("/").Handler(http.FileServer(http.Dir(staticFiles)))
+	}
+
+	log.Printf("connect to http://localhost:%s/graphql-playground for GraphQL playground", port)
 	log.Fatal(http.ListenAndServe("127.0.0.1:"+port,
 		handlers.CORS(handlers.AllowedHeaders([]string{"X-Requested-With", "Content-Type", "Authorization"}),
 			handlers.AllowedMethods([]string{"GET", "POST", "HEAD", "OPTIONS"}),