Rename the TUF_API_URL to RSTUF_API_URL

Rename the environment variable setting `TUF_API_URL` to `RSTUF_API_URL`
as this API is provided by Repository Service for TUF (RSTUF).

Signed-off-by: Kairo de Araujo <kdearaujo@vmware.com>

Author: Kairo de Araujo

dev/environment

@@ -71,7 +71,7 @@ RECAPTCHA_SITE_KEY=6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI
 RECAPTCHA_SECRET_KEY=6LeIxAcTAAAAAGG-vFI1TnRWxMZNFuojJ4WifJWe
 
 TUF_METADATA_URL="http://files:9001/metadata/"
-TUF_API_URL="http://rstuf-api/api/v1/"
+RSTUF_API_URL="http://rstuf-api/api/v1/"
 TUF_DATABASE_URL="postgresql://postgres@db/rstuf"
 TUF_ROOT_SECRET="an insecure private key password"
 TUF_ONLINE_SECRET="an insecure private key password"

warehouse/config.py

@@ -254,7 +254,7 @@ def configure(settings=None):
     )
     maybe_set(settings, "tuf.database.url", "TUF_DATABASE_URL")
     maybe_set(settings, "tuf.metadata.url", "TUF_METADATA_URL")
-    maybe_set(settings, "tuf.api.url", "TUF_API_URL")
+    maybe_set(settings, "tuf.api.url", "RSTUF_API_URL")
     maybe_set(settings, "tuf.root1.secret", "TUF_ROOT_SECRET")
     maybe_set(settings, "tuf.root2.secret", "TUF_ROOT_SECRET")
     maybe_set(settings, "tuf.online.secret", "TUF_ROOT_SECRET")