First version of packer and terraform templates for DB

Description

initial version of packer and terraform scripts to build AMI (for AWS as for now) and provision EC2 instance based on this AMI

Related issue

#164 (closed)

Examples

To create AMI

packer build -var 'ami_name_prefix=DBLABserver' template.json

to provision EC2 instance

terraform apply

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes, specifications reflect those changes and they have been reviewed OR there are no API changes