download source maps for external js files (#5)

External dependencies were made locally available through:
#3
On opening Dev console, the external JS libraries attempt to fetch
source maps. This PR brings them in too.

Also noticed that `wss` is used first and then once it fails, `ws`
protocol is used. For this, a simpler fix by directly checking
[location.protocol](https://developer.mozilla.org/en-US/docs/Web/API/Location/protocol#browser_compatibility).

gulpfile.js

@@ -71,7 +71,8 @@ gulp.task('copy-files', () => {
         'public/img/**',
         'public/webfonts/*',
         'public/js/*.min.js',
-        'public/ext/js/*.min.js',
+        'public/ext/js/*.js',
+        'public/ext/map/*.map',
         'public/ext/css/*.min.css',
       ],
       {

public/js/download-manager.js

@@ -7,6 +7,9 @@ const component = () => {
     ws: undefined,
 
     wsConnect(secure = true) {
+      if (location.protocol !== 'https:') {
+        secure = false;
+      }
       const url = `${secure ? 'wss' : 'ws'}://${
         location.host
       }${base_url}api/admin/mangadex/queue`;

src/util/util.cr

@@ -2,7 +2,7 @@ IMGS_PER_PAGE            = 5
 ENTRIES_IN_HOME_SECTIONS = 8
 UPLOAD_URL_PREFIX        = "/uploads"
 STATIC_DIRS              = %w(/css /ext/css /js /ext/js /img /webfonts
-  /favicon.ico /robots.txt /manifest.json)
+  /ext/map /favicon.ico /robots.txt /manifest.json)
 SUPPORTED_FILE_EXTNAMES = [".zip", ".cbz", ".rar", ".cbr"]
 SUPPORTED_IMG_TYPES     = %w(
   image/jpeg