Remove composer.lock composer.json and vendor from nginx image

[acbramley]

The nginx image currently contains composer files and a vendor directory. This should not be part of the nginx image.

This leads the lagoon dashboard reporting multiple versions of Drupal/Drush running on production environments.

These files do not exist in the lagoon base image.

❯ docker run -it govcms/nginx-drupal:10.x-latest sh
Setting up Healthz routing
nginx:/app$ ls -la
total 944
drwxr-xr-x    1 root     root          4096 Aug  4 19:53 .
drwxr-xr-x    1 root     root          4096 Aug  6 05:27 ..
-rw-r--r--    1 root     root           357 Aug  4 19:45 .editorconfig
-rw-r--r--    1 root     root          4222 Aug  4 19:45 .gitattributes
-rw-rw-rw-    1 root     root          3015 Aug  4 19:44 composer.json
-rw-r--r--    1 root     root        911663 Aug  4 19:45 composer.lock
drwxr-xr-x    3 root     root          4096 Aug  4 19:44 custom
drwxr-xr-x    3 root     root          4096 Aug  4 19:45 drush
drwxr-xr-x    3 root     root          4096 Aug  4 19:44 scripts
drwxr-xr-x    4 root     root          4096 Aug  4 19:44 simplesaml
drwxr-xr-x   58 root     root          4096 Aug  4 19:45 vendor
drwxr-xr-x    1 root     root          4096 Aug  6 05:27 web

[jackwrfuller]

Hey @acbramley thanks for the suggestion. Would you be able to provide a PR with your idea for the implementation? I can look into doing it myself, but if you had one in mind it would definitely help speed things up.