fix flake8 and add MIME types to lambda setup (#781)

* fix flake8 and add MIME types to lambda setup

* add fixes per #660)

aws-lambda/container/.serverless-wsgi

@@ -1 +1,10 @@
-{"app":"pygeoapi/flask_app.APP","text_mime_types":["application/ld+json"]}
+{
+    "app": "pygeoapi/flask_app.APP",
+    "text_mime_types": [
+        "application/ld+json",
+        "text/html",
+        "application/geo+json",
+        "application/prs.coverage+json",
+        "application/xml"
+    ]
+}

aws-lambda/container/wsgi.py

@@ -1,9 +1,10 @@
 import os
 
+from pygeoapi.flask_app import APP
+
 os.environ['PYGEOAPI_CONFIG'] = 'pygeoapi-test-config.yml'
 os.environ['PYGEOAPI_OPENAPI'] = 'pygeoapi-test-openapi.yml'
 
-from pygeoapi.flask_app import APP
 
 if __name__ == "__main__":
     APP.run()