I can't add FOV settings to the game menu yet, but you can make changes to the game files to set FOV yourself..

Open the file with a text editor:
\Steam\steamapps\common\ZERO PROTOCOL\package. nw\scripts\c3runtime .js

Use Search to find the string:
{this._fieldOfView=

After the equal sign, specify the desired FOV value in the range of 0.8 to 1.4

For example:
{this._fieldOfView=1.25} - increase the FOV value
{this._fieldOfView=0.92} - lower the FOV value