nginx server requires trailing slash locations like phpmyadmin

[apolopena]

Describe the bug

nginx server requires trailing slash for phpmyadmin url

Steps to reproduce

run this starter with phpmyadmin installed
go to the url (replace domain with domain of your workspace)
https://8002-tan-mongoose-eayo0p7n.ws-us03.gitpod.io/phpmyadmin
404 error
but going to
https://8002-tan-mongoose-eayo0p7n.ws-us03.gitpod.io/phpmyadmin/
is a 200 success

Expected behavior

the trailing slash in the url to phpmyadmin should not matter. apache redirects to the trailing slash.

Additional information

[apolopena]

Depends on #96