Modify to use Multi stage docker image

[lawliet89]

No description provided.

[lawliet89]

There is currently some issue with the OpenSSL compiled into the binary.

pr_demon_1  | [2017-06-16T05:05:42-0000][ERROR]  Error preparing PR Transformer: Error requesting for VCS fetch https://xxx/app/rest/latest/vcs-root-instances/checkingForChangesQueue?locator=buildType(id:bgp_UnitTests): The OpenSSL library reported an error: The OpenSSL library reported an error: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:s3_clnt.c:1264:

pr_demon_1  | [2017-06-16T05:05:42-0000][WARN]          Error fetching builds — queuing anyway: Error getting list of builds https://xxx/app/rest/latest/buildTypes/id:bgp_UnitTests/builds?locator=defaultFilter:false,state:any,canceled:false,revision:(39ce853aba01ccae1c4cb466fb3a660d95b68832): The OpenSSL library reported an error: The OpenSSL library reported an error: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:s3_clnt.c:1264:

It might be useful to note that the TeamCity server in this instance is using a Let's Encrypt certificate.

[lawliet89]

Probably related to cross-rs/cross#119