Move cargo.png into assets folder (rust-lang#5591)

There is no obvious need for this file to exist outside of the `assets` folder and need special handling in nginx

Author: Turbo87

app/components/header.hbs

@@ -1,7 +1,7 @@
 <header local-class="header {{if @hero "hero"}}">
   <div local-class="header-inner">
     <LinkTo @route="index" local-class="index-link">
-      <img src="/cargo.png" role="presentation" alt="" local-class="logo">
+      <img src="/assets/cargo.png" role="presentation" alt="" local-class="logo">
       <h1>crates.io</h1>
     </LinkTo>
 

app/index.html

@@ -18,7 +18,7 @@
 
     {{content-for 'head-footer'}}
     <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
-    <link rel="icon" href="/cargo.png" type="image/png">
+    <link rel="icon" href="/assets/cargo.png" type="image/png">
     <link rel="search" href="/opensearch.xml" type="application/opensearchdescription+xml" title="Cargo">
 
     <meta name="google" content="notranslate" />

config/manifest.js

@@ -11,7 +11,7 @@ module.exports = function (/* environment, appConfig */) {
     theme_color: '#f9f7ec',
     icons: [
       {
-        src: '/cargo.png',
+        src: '/assets/cargo.png',
         sizes: '227x227',
         type: 'image/png',
       },

config/nginx.conf.erb

@@ -203,13 +203,6 @@ http {
 			expires max;
 		}
 
-		location ~ ^/cargo-[0-9a-f]*\.png$ {
-			add_header X-Content-Type-Options nosniff;
-			add_header Cache-Control public;
-			root dist;
-			expires max;
-		}
-
 		location ~ /(favicon\.ico|robots\.txt|opensearch\.xml) {
 			add_header X-Content-Type-Options nosniff;
 			add_header Cache-Control public;

public/cargo.png renamed to public/assets/cargo.png

@@ -2,6 +2,6 @@
 <OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
     <ShortName>Cargo</ShortName>
     <Description>Search for crates on crates.io</Description>
-    <Image type="image/png">https://crates.io/cargo.png</Image>
+    <Image type="image/png">https://crates.io/assets/cargo.png</Image>
     <Url type="text/html" method="get" template="https://crates.io/search?q={searchTerms}"/>
 </OpenSearchDescription>