Add explicit localenv option

Author: mkhorton

pyproject.toml

@@ -21,6 +21,7 @@ pyfftw = { version = "*", optional = true }
 
 dash = { version = "^2.0.0", optional = true }
 dash-daq = { version = "*", optional = true }
+dscribe = { version = "*", optional = true }
 gunicorn = { version = "*", optional = true }
 redis = { version = "*", optional = true }
 Flask-Caching = { version = "*", optional = true }
@@ -52,6 +53,7 @@ server = [
 ]
 fermi = ["ifermi", "pyfftw"]
 vtk = ["dash-vtk"]
+localenv = ["dscribe"]
 figures = ["kaleido"]
 
 [tool.poetry.dev-dependencies]