Remove third party CDN's (#50)

* Use local files instead cdn

* Drop legacy fonts

* Drop legacy FiraCode fonts

maubot/management/frontend/public/fonts/FiraCode@1.206/fira_code.css

@@ -0,0 +1,28 @@
+@font-face{
+    font-family: 'Fira Code';
+    src: url('woff2/FiraCode-Light.woff2') format('woff2');
+    font-weight: 300;
+    font-style: normal;
+}
+
+@font-face{
+    font-family: 'Fira Code';
+    src: url('eot/FiraCode-Regular.eot');
+    src: url('woff2/FiraCode-Regular.woff2') format('woff2');
+    font-weight: 400;
+    font-style: normal;
+}
+
+@font-face{
+    font-family: 'Fira Code';
+    src: url('woff2/FiraCode-Medium.woff2') format('woff2');
+    font-weight: 500;
+    font-style: normal;
+}
+
+@font-face{
+    font-family: 'Fira Code';
+    src: url('woff2/FiraCode-Bold.woff2') format('woff2'),
+    font-weight: 700;
+    font-style: normal;
+}

maubot/management/frontend/public/fonts/raleway/raleway.css

@@ -0,0 +1,26 @@
+/* raleway-300 - latin */
+@font-face {
+  font-family: 'Raleway';
+  font-style: normal;
+  font-weight: 300;
+  src: local('Raleway Light'), local('Raleway-Light'),
+       url('raleway-v13-latin-300.woff2') format('woff2'), /* Chrome 26+, Opera 23+, Firefox 39+ */
+}
+
+/* raleway-regular - latin */
+@font-face {
+  font-family: 'Raleway';
+  font-style: normal;
+  font-weight: 400;
+  src: local('Raleway'), local('Raleway-Regular'),
+       url('raleway-v13-latin-regular.woff2') format('woff2'), /* Chrome 26+, Opera 23+, Firefox 39+ */
+}
+
+/* raleway-700 - latin */
+@font-face {
+  font-family: 'Raleway';
+  font-style: normal;
+  font-weight: 700;
+  src: local('Raleway Bold'), local('Raleway-Bold'),
+       url('raleway-v13-latin-700.woff2') format('woff2'), /* Chrome 26+, Opera 23+, Firefox 39+ */
+}

maubot/management/frontend/public/index.html

@@ -21,9 +21,9 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
     <meta charset="utf-8">
     <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.png">
     <link rel="stylesheet" type="text/css"
-          href="https://fonts.googleapis.com/css?family=Raleway:300,400,700">
+          href="%PUBLIC_URL%/fonts/raleway/raleway.css">
     <link rel="stylesheet" type="text/css"
-          href="https://cdn.jsdelivr.net/gh/tonsky/FiraCode@1.206/distr/fira_code.css">
+          href="%PUBLIC_URL%/fonts/FiraCode@1.206/fira_code.css">
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
     <meta name="theme-color" content="#50D367">
     <link rel="manifest" href="%PUBLIC_URL%/manifest.json">