fix of dark theme of 'content-boxes' on German 'Main_Page' (#46)

src/utils.js

@@ -75,7 +75,7 @@ module.exports = function(redis) {
 
     // load custom language specific languages
     let lang_suffix = ''
-    let load_custom_styles = ['fr', 'ko']
+    let load_custom_styles = ['de', 'fr', 'ko']
 
     if(load_custom_styles.includes(lang)) {
       lang_suffix = '_' + lang

static/styles_de.css

@@ -0,0 +1,2 @@
+@import "wikipedia_styles_light.css";
+@import "wikipedia_styles_dark_de.css" (prefers-color-scheme: dark);

static/wikipedia_styles_dark_de.css

@@ -0,0 +1,12 @@
+@import "wikipedia_styles_dark.css";
+
+/* slightly increasing readability of top-left wikipedia logo */
+#p-logo .mw-wiki-logo {
+    filter: invert(1);
+}
+
+/* big white boxes on German landing page */
+.mw-parser-output .hauptseite-box-content,
+.mw-parser-output .hauptseite-preview-wikidata {
+    background-color: transparent!important;
+}

static/wikipedia_styles_light_de.css

@@ -0,0 +1,2 @@
+@import "wikipedia_styles_light.css";
+