Canvas: App wide env vars

Change-Id: Ia4101ba7c646e33591a1ddd642622e2712865b71
diff --git a/apps/canvas/back/prisma/schema.prisma b/apps/canvas/back/prisma/schema.prisma
index e80b827..3eb8df9 100644
--- a/apps/canvas/back/prisma/schema.prisma
+++ b/apps/canvas/back/prisma/schema.prisma
@@ -22,6 +22,7 @@
   instanceId      String?
   deployKey       String?
   deployKeyPublic String?
+  envVars         String?
   githubToken     String?
   access          String?
   geminiApiKey    String?