feat: Add ability to sync dokku packages to a new version of ubuntu

This will allow us to quickly roll out support for future versions of the OS.

[ci skip]

contrib/copy-packages

@@ -0,0 +1,51 @@
+#!/usr/bin/env python2.7
+import os
+import requests
+import shutil
+import subprocess
+from requests.auth import HTTPBasicAuth
+
+PACKAGECLOUD_API_TOKEN = os.getenv('DOKKU_PACKAGECLOUD_API_TOKEN')
+
+
+def download_file(filename, url):
+    r = requests.get(url, stream=True)
+    with open(filename, 'wb') as f:
+        shutil.copyfileobj(r.raw, f)
+
+
+def upload_file(filename):
+    versions = [
+        "bionic",
+    ]
+    cmd_template = "package_cloud push dokku/dokku/ubuntu/{0} {1}"
+    for version in versions:
+        cmd = cmd_template.format(version, filename)
+        subprocess.call(cmd, shell=True)
+
+
+def main():
+    auth = HTTPBasicAuth(PACKAGECLOUD_API_TOKEN, '')
+    base = requests.get('https://packagecloud.io/api/v1/repos/dokku/dokku/packages/deb/ubuntu/trusty.json',
+                        auth=auth)
+    data = base.json()
+    urls = []
+    for package in data:
+        urls.append(package['versions_url'])
+
+    download_urls = {}
+    for url in urls:
+        base = requests.get('https://packagecloud.io{0}'.format(url),
+                            auth=auth)
+        data = base.json()
+        for version in data:
+            download_urls['downloads/' + version['filename']] = version['download_url']
+
+    for filename, download_url in download_urls.items():
+        print "downloading", filename
+        download_file(filename, download_url)
+        upload_file(filename)
+
+
+if __name__ == "__main__":
+    main()