Update dev requirements for doc generation

.readthedocs.yml

@@ -0,0 +1,21 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# Optionally build your docs in additional formats such as PDF
+formats: all
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.7
+  install:
+    - method: pip
+      path: .
+    - requirements: dev-requirements.txt

dev-requirements.txt

@@ -7,4 +7,6 @@ Sphinx==3.0.0
 recommonmark==0.6.0
 sphinx_rtd_theme
 google-cloud-vision
-pytesseract
+pytesseract
+pycocotools
+git+https://github.com/facebookresearch/[email protected]#egg=detectron2