fixed script entrypoint

docker/Dockerfile

@@ -4,7 +4,10 @@ RUN mkdir /io
 COPY . /io
 WORKDIR /io
 
+RUN pip install --upgrade pip wheel setuptools
+
 RUN pip install -r requirements.txt -r requirements-test.txt
+RUN pip install -e .
 
 # download nltk resources
 RUN python -m nltk.downloader wordnet

setup.cfg

@@ -38,4 +38,4 @@ exclude = "*.tests", "*.tests.*", "tests.*", "tests"
 
 [options.entry_points]
 console_scripts =
-    extra_model = extra_model._cli:entrypoint
+    extra-model = extra_model._cli:entrypoint

setup.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python
+
+# We still need a setup.py shim so we can still pip install -e .
+# https://snarky.ca/what-the-heck-is-pyproject-toml/#how-to-use-pyproject-toml-with-setuptools
+
+import setuptools
+
+if __name__ == "__main__":
+    setuptools.setup()