Change max http header size to 1M

This MR is to fix errors on large buffer sizes when you push it with large cookies. Without it it will return 431 error.

Dockerfile

@@ -21,4 +21,4 @@ RUN apk add --update 'nodejs<13.0.0'
 EXPOSE 80
 
 ENV APP__ENV_NAME=prod
-CMD node -r esm src/api.js
+CMD node --max-http-header-size=1048576 -r esm src/api.js