Create OpenAPI spec for Helioviewer & generate docs from spec

.gitignore

@@ -73,3 +73,4 @@ docroot/status.xml
 py_env
 py_venv_local_sunpy
 vendor
+docroot/playground

docs/src/Makefile

@@ -10,6 +10,7 @@ BUILDDIR      = build
 # Since sphinx forces an "html" folder with the documentation, we're going to
 # move all that content into the docs/v2 folder
 TARGET_DIR = ../../docroot/docs/v2
+PLAYGROUND_TARGET_DIR = $(TARGET_DIR)/playground
 
 # Put it first so that "make" without argument is like "make help".
 help:
@@ -20,6 +21,9 @@ help:
 docs: html
 	mkdir -p ${TARGET_DIR}
 	cp -r ${BUILDDIR}/html/* ${TARGET_DIR}
+	cp openapi.yaml ${TARGET_DIR}
+	mkdir -p ${PLAYGROUND_TARGET_DIR}
+	cp -r playground/* ${PLAYGROUND_TARGET_DIR}
 
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).