Switched fonts to self-hosted (#126)

Co-authored-by: Adam Bem <adam.bem@zoho.eu>
Reviewed-on: #126

Frontend/assets/css/frame.css

@@ -1,4 +1,7 @@
-@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap');
+@font-face {
+    font-family: "Nunito";
+    src: url('../fonts/Nunito-VariableFont_wght.ttf') format('truetype');
+}
 
 html {
     background-image: url("../images/background.jpg");
@@ -6,9 +9,9 @@ html {
 
 body {
     font-family: 'Nunito', sans-serif;
+    font-weight: 200;
     
     color: #2e3133;
-    font-weight: normal;
     margin: 0px;
 }
 
@@ -59,7 +62,7 @@ div#leftBar {
 
 li {
     font-size: 20px;
-    font-weight: bold;
+    font-weight: 300;
 }
 
 div#copyright{