Document the database dumps in the frontend.

Author: smarnach

app/router.js

@@ -46,6 +46,7 @@ Router.map(function() {
   this.route('category-slugs', { path: 'category_slugs' });
   this.route('team', { path: '/teams/:team_id' });
   this.route('policies');
+  this.route('data-access');
   this.route('confirm', { path: '/confirm/:email_token' });
 
   this.route('catch-all', { path: '*path' });

app/templates/data-access.hbs

@@ -0,0 +1,34 @@
+<div id='crates-heading'>
+  {{svg-jar 'circle-with-i'}}
+  <h1>Accessing the Crates.io Data</h1>
+</div>
+
+<p>
+  There are several ways of accessing the Crates.io data. You should try the
+  options in the order listed.
+</p>
+
+<ol>
+  <li>
+    <b>
+      The <a href='https://github.com/rust-lang/crates.io-index'>crates.ioindex</a>.
+    </b>
+    This git repository is always kept up to date by crates.io, and it is used
+    by Cargo to speed up local dependency resolution. It contains the majority
+    of the data exposed by crates.io and is cheap to clone and to update.
+  </li>
+  <li>
+    <b>The database dumps (experimental).</b> The dumps contain all information
+    exposed by the API in a single download. They are updated every six hours.
+    The latest dump is available at the address
+    <a href='https://static.crates.io/db-dump.tar.gz'>https://static.crates.io/db-dump.tar.gz</a>.
+    Information on using the dump is contained in the tarball.
+  </li>
+  <li>
+    <b>Crawl the crates.io API.</b> This should be used as a last resort, and
+    doing so is subject to our {{#link-to 'policies'}}crawling policy{{/link-to}}.
+    If the index and the database dumps do not satisfy your needs, we're happy to
+    discuss solutions to your needs that don't require you to crawl the registry.
+    You can email us at <a href="mailto:[email protected]">[email protected]</a>.
+  </li>
+</ol>

app/templates/policies.hbs

@@ -112,15 +112,8 @@
 <h2 id='crawlers'><a href='#crawlers'>Crawlers</a></h2>
 
 <p>
-  Before resorting to crawling crates.io, you should first see if you are able to
-  gather the information you need from the
-  <a href='https://github.com/rust-lang/crates.io-index'>crates.io index</a>,
-  which is a public git repository containing the majority
-  of the information availble through our API.
-
-  If the index does not have the information you need, we're also happy to
-  discuss solutions to your needs that don't require you to crawl the registry.
-  You can email us at <a href="mailto:[email protected]">[email protected]</a>.
+  Before resorting to crawling crates.io, please read
+  {{#link-to 'data-access'}}Accessing the Crates.io Data{{/link-to}}.
 </p>
 
 <p>