Fix for NFS Filesystems

Exception "file_put_contents(): Exclusive locks are not supported for this stream ..." on handling file uploads with nfs filesystem.

This release includes the update of files and the whole remote file caching stuff.

Added proxy file update

Merge pull request #22 from ipunkt/analysis-z3yAZP

Apply fixes from StyleCI

Added security token validation

change nginx image version to 1.2.15

@see 1faaf9f14294990c00eb0ef40b81d223de6f5fa2

First Release

Update Dockerfile

Set latest version