Embedd the public GPG key (D59097AB) for more reliability.
Merge apt::key/apt::sourrce resources.

Use the combined resource format for shorter/smipler
code as well as better encapsulation.
Embed the private repo public GPG key (CB1C35E2).

After confirming with Opsmatic, embeding this public key
into the repo for reliability during system launches.
Merge pull request #5 from Nextdoor/embedded_gpg_keys

Embed the GPG Keys for the two repos into the codebase