Snapshot version for local package

[oliveromahony]

Proposed changes

Describe the use case and detail of the change. If this PR addresses an issue on GitHub, make sure to include a link to that issue using one of the supported keywords here in this description (not in the title of the PR).

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation (README.md)

Output:

sudo apt-get install -f -y ./nginx-agent-2.17.0-SNAPSHOT-3586ff7.deb 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'nginx-agent' instead of './nginx-agent-2.17.0-SNAPSHOT-3586ff7.deb'
The following NEW packages will be installed:
  nginx-agent
0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B/12.4 MB of archives.
After this operation, 23.9 MB of additional disk space will be used.
Get:1 /home/vagrant/host_user_homedir/Development/go/agent/build/nginx-agent-2.17.0-SNAPSHOT-3586ff7.deb nginx-agent amd64 2.17.0 [12.4 MB]
debconf: delaying package configuration, since apt-utils is not installed
Selecting previously unselected package nginx-agent.
(Reading database ... 79697 files and directories currently installed.)
Preparing to unpack .../nginx-agent-2.17.0-SNAPSHOT-3586ff7.deb ...

 --- NGINX Agent Package Installer --- 

 --- Will install the NGINX Agent in 5 seconds ---
 --- Install log is outputted to: /tmp/agent-install.log
Sudo permissions detected
Updating /etc/nginx-agent/agent-dynamic.conf ...

/etc/nginx-agent/nginx-agent.conf does not exist exiting.
Unpacking nginx-agent (2.17.0) ...
Setting up nginx-agent (2.17.0) ...
/usr/bin/systemctl
PostInstall: Reading NGINX systemctl unit file for user information
/run/nginx.pid does not exist
No NGINX user found
PostInstall: Reading NGINX process information to determine NGINX user
No NGINX user found
WARNING: No NGINX processes detected.
PostInstall: Reading NGINX process information to determine NGINX user
No NGINX worker user found
WARNING: No NGINX worker processes detected.
Sudo permissions detected
Found nginx-agent /usr/bin/nginx-agent
/usr/bin/systemctl
PostInstall: Adding nginx-agent group nginx-agent
groupadd: group 'nginx-agent' already exists
PostInstall: Adding NGINX / agent user root to group nginx-agent
PostInstall: Creating NGINX Agent run directory 
PostInstall: Modifying group ownership of NGINX Agent run directory 
/usr/bin/systemctl
PostInstall: Modifying NGINX Agent unit file with correct locations and user information
PostInstall: Reload the service unit from disk
PostInstall: Unmask the service unit from disk
PostInstall: Set the preset flag for the service unit
Created symlink /etc/systemd/system/multi-user.target.wants/nginx-agent.service → /etc/systemd/system/nginx-agent.service.
PostInstall: Set the enabled flag for the service unit
----------------------------------------------------------------------
 NGINX Agent package has been successfully installed.

 Please follow the next steps to start the software:
    sudo systemctl start nginx-agent

 Configuration settings can be adjusted here:
    /etc/nginx-agent/nginx-agent.conf

----------------------------------------------------------------------
vagrant@devenv-agent:~/host_user_homedir/Development/go/agent/build$ sudo nginx-agent --version
nginx-agent version v2.17.0-3586ff7