add style from silvermone chromecast plugin

backend/install.sh

@@ -1,5 +0,0 @@
-#!/usr/bin/env sh
-virtualenv --python=$(which python3) /app/venv
-source /app/venv/bin/activate
-pip install --upgrade pip
-pip install --upgrade streamlink youtube-dl tornado aiohttp aiohttp-socks

backend/style.js

@@ -0,0 +1,26 @@
+#!/usr/bin/env node
+
+const fs = require("fs");
+const css = require("css");
+
+fs.readFile("/app/chromecast.css", "utf-8", (err, data) => {
+    const ast = css.parse(data);
+    for(const rule of ast.stylesheet.rules) {
+        const decls = [];
+        if(Symbol.iterator in Object(rule.declarations)) {
+            for(const decl of rule.declarations) {
+                const isNotUrl = !(decl.value.toLowerCase().startsWith("url"));
+                const isNotContent = !(decl.property.toLowerCase() == "content");
+                if(isNotContent && isNotUrl) {
+                    decls.push(decl);
+                }
+            }
+            rule.declarations = decls;
+        }
+    }
+    fs.appendFile("/app/style.css", css.stringify(ast, {"compress": true}), (err) => {
+        if(err !== null) {
+            console.log(err);
+        }
+    });
+});