Use Takashi's app.yaml.

Brent was having some trouble serving posts on his site
with the simple app.yaml before this change.

Author: Issac Trotts

appengine/standard/wordpress/app/app.yaml

@@ -2,6 +2,55 @@ runtime: php72
 instance_class: F2
 
 handlers:
-- url: /(.*)
-  script: \1
+- url: /(.*\.(htm|html|css|js))
+  static_files: \1
+  upload: .*\.(htm|html|css|js)$
+  application_readable: true
+  secure: always
+
+- url: /wp-content/(.*\.(ico|jpg|jpeg|png|gif|woff|ttf|otf|eot|svg))
+  static_files: wp-content/\1
+  upload: wp-content/.*\.(ico|jpg|jpeg|png|gif|woff|ttf|otf|eot|svg)$
+  application_readable: true
+  secure: always
+
+- url: /(.*\.(ico|jpg|jpeg|png|gif|woff|ttf|otf|eot|svg))
+  static_files: \1
+  upload: .*\.(ico|jpg|jpeg|png|gif|woff|ttf|otf|eot|svg)$
+  application_readable: true
+  secure: always
+
+- url: /wp-includes/images/media/(.*\.(ico|jpg|jpeg|png|gif|woff|ttf|otf|eot|svg))
+  static_files: wp-includes/images/media/\1
+  upload: wp-includes/images/media/.*\.(ico|jpg|jpeg|png|gif|woff|ttf|otf|eot|svg)$
+  application_readable: true
+  secure: always
+
+- url: /wp-admin/(.+)
+  script: wp-admin/\1
+  secure: always
+
+- url: /wp-admin/
+  script: wp-admin/index.php
+  secure: always
+
+- url: /wp-login.php
+  script: wp-login.php
+  secure: always
+
+- url: /wp-cron.php
+  script: wp-cron.php
+  login: admin
+  secure: always
+
+- url: /xmlrpc.php
+  script: xmlrpc.php
+  secure: always
+
+- url: /wp-(.+).php
+  script: wp-\1.php
+  secure: always
+
+- url: /(.+)?/?
+  script: index.php
   secure: always