Finished subpath implementation

config/config.go

@@ -30,12 +30,12 @@ func init() {
 
 	ServerAddress = os.Getenv("SERVER_ADDRESS")
 
-	Prefix = os.Getenv("PREFIX")
+	Prefix = path.Join(os.Getenv("PREFIX"))
 
 	DatabaseFile = os.Getenv("DATABASE_FILE")
 	FrontendDir = os.Getenv("FRONTEND_DIR")
 
 	PageBase = pageBase{
-		BasePath: "http://" + path.Join(ServerAddress, Prefix),
+		BasePath: "http://" + path.Join(ServerAddress, Prefix) + "/",
 	}
 }

main.go

@@ -11,7 +11,6 @@ import (
 	"net/http"
 	"path"
 	"path/filepath"
-	"strings"
 )
 
 func main() {
@@ -56,16 +55,13 @@ func setupApi(r *mux.Router) {
 func setupFrontend(r *mux.Router) {
 	r.HandleFunc("/article/{article}", server.Article).Methods(http.MethodGet)
 
-	r.HandleFunc("/favicon.ico", func(w http.ResponseWriter, r *http.Request) {
-		http.ServeFile(w, r, filepath.Join(config.FrontendDir, "img", "logodark.svg"))
-	})
 	r.PathPrefix("/sass/").HandlerFunc(server.ServePath)
 	r.PathPrefix("/img/").HandlerFunc(server.ServePath)
 
 	landingpage := template.Must(template.ParseFiles(filepath.Join(config.FrontendDir, "html", "landingpage.gohtml")))
 
 	r.PathPrefix("/").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if strings.TrimPrefix(r.URL.Path, path.Dir(config.Prefix)) == "/" {
+		if path.Join(config.Prefix)+"/" == r.URL.Path {
 			landingpage.Execute(w, config.PageBase)
 		} else {
 			server.Error404(w, r)

server/path.go

@@ -5,10 +5,11 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 )
 
 func ServePath(w http.ResponseWriter, r *http.Request) {
-	path := filepath.Join(config.FrontendDir, r.URL.Path)
+	path := filepath.Join(config.FrontendDir, strings.TrimPrefix(r.URL.Path, config.Prefix))
 	if _, err := os.Stat(path); os.IsNotExist(err) {
 		Error404(w, r)
 	} else {