Add fuchsia/sdk/banjo to Dockerfile

This was missed in Idd863f42bd176551c400b8f179c96612e4145cea.

Bug: 72629
Change-Id: I13ecaaa46911d2a66985a22f3b11233607b4defd
Reviewed-on: https://fuchsia-review.googlesource.com/c/fidlbolt/+/646181
Reviewed-by: Yifei Teng <yifeit@google.com>
diff --git a/Dockerfile b/Dockerfile
index fd618a3..89ef227 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,8 +25,9 @@
 COPY deployment /deployment
 
 # Run the web server on container startup.
+# TODO(fxbug.dev/72629): Remove fuchsia/sdk/banjo.
 CMD ["/server", \
     "-static", "/static", \
     "-bin", "/deployment/bin", \
     "-etc", "/deployment/etc", \
-    "-fidl", "/deployment/fuchsia/sdk/fidl:/deployment/fuchsia/zircon"]
+    "-fidl", "/deployment/fuchsia/sdk/fidl:/deployment/fuchsia/sdk/banjo:/deployment/fuchsia/zircon"]