orchardup/fig-rails-example — pull request #1 by lazyatom (2014-01-30 16:59:58+00:00)
Title: Ensure apt is up-to-date before installing stuff

Without this, I see the following error when trying to build the container:

```
WARNING: The following packages cannot be authenticated!
libroken18-heimdal libasn1-8-heimdal libgpg-error0 libgcrypt11 libp11-kit0
libtasn1-3 libgnutls26 libkrb5support0 libk5crypto3 libkeyutils1 libkrb5-3
libgssapi-krb5-2 libidn11 libhcrypto4-heimdal libheimbase1-heimdal
libwind0-heimdal libhx509-5-heimdal libkrb5-26-heimdal libheimntlm0-heimdal
libgssapi3-heimdal libsasl2-2 libldap-2.4-2 librtmp0 openssl ca-certificates
libcurl3-gnutls iso-codes krb5-locales libsasl2-modules python-apt-common
python-apt python-gnupginterface xz-lzma unattended-upgrades python-pycurl
python-software-properties
E
:
There are problems and -y was used without --force-yes

Error: The command [/bin/sh -c apt-get install -y python-software-properties] returned a non-zero code: 100
```