feat: Add DB_SSL_MODE environment variable for Postgres sslmode (#18025)

* feat: Add DB_SSL_MODE environment variable for Postgres sslmode

* chore: clean up

---------

Co-authored-by: Jason Rasmussen <jason@rasm.me>

server/src/enum.ts

@@ -610,3 +610,11 @@ export enum OAuthTokenEndpointAuthMethod {
   CLIENT_SECRET_POST = 'client_secret_post',
   CLIENT_SECRET_BASIC = 'client_secret_basic',
 }
+
+export enum DatabaseSslMode {
+  Disable = 'disable',
+  Allow = 'allow',
+  Prefer = 'prefer',
+  Require = 'require',
+  VerifyFull = 'verify-full',
+}