received unexpected HTTP status: 500 Internal Server Error

[wuwangzhang1216]

I ran the script and met the following issue, during the "Build App" part I received error code 500 Internal Server Error.
Hope someone could help me to figure it out.
Thank you very much!

=== Fetching app code
=== Building web (Dockerfile)
Sending build context to Docker daemon 27.14kBStep 1/4 : FROM jboss/keycloak:latest
latest: Pulling from jboss/keycloak
ac10f00499d5: Pulling fs layer
96d53117c12e: Pulling fs layer
1d929376eb7f: Pulling fs layer
93e1e1b6d192: Pulling fs layer
f353ba0db29e: Pulling fs layer
93e1e1b6d192: Waiting
f353ba0db29e: Waiting
96d53117c12e: Verifying Checksum
96d53117c12e: Download complete
93e1e1b6d192: Verifying Checksum
93e1e1b6d192: Download complete
ac10f00499d5: Verifying Checksum
ac10f00499d5: Download complete
1d929376eb7f: Verifying Checksum
1d929376eb7f: Download complete
f353ba0db29e: Verifying Checksum
f353ba0db29e: Download complete
ac10f00499d5: Pull complete
96d53117c12e: Pull complete
1d929376eb7f: Pull complete
93e1e1b6d192: Pull complete
f353ba0db29e: Pull complete
Digest: sha256:abdb1aea6c671f61a594af599f63fbe78c9631767886d9030bc774d908422d0a
Status: Downloaded newer image for jboss/keycloak:latest
---> 011a708d97bf
Step 2/4 : COPY docker-entrypoint.sh /opt/jboss/tools
---> 9d3ef9f22ec1
Step 3/4 : ENTRYPOINT [ "/opt/jboss/tools/docker-entrypoint.sh" ]
---> Running in a1cd5ad2619c
Removing intermediate container a1cd5ad2619c
---> 16bc2ae2ac2f
Step 4/4 : CMD ["-b", "0.0.0.0"]
---> Running in e4267bb7194d
Removing intermediate container e4267bb7194d
---> b3150ffcf4bf
Successfully built b3150ffcf4bf
Successfully tagged 78eeb47f4dfe17b764d415d03b94a70b3654f23f:latest
=== Pushing web (Dockerfile)
Tagged image "78eeb47f4dfe17b764d415d03b94a70b3654f23f" as "registry.heroku.com/lightning-goods-keycloak/web"
Using default tag: latest
The push refers to repository [registry.heroku.com/lightning-goods-keycloak/web]
d5235395302e: Preparing
1dfd2148097e: Preparing
e39e8e4412ef: Preparing
7848251d9a6c: Preparing
a65a1b01a4d2: Preparing
af092941766c: Preparing
a65a1b01a4d2: Pushed
d5235395302e: Pushed
e39e8e4412ef: Pushed
af092941766c: Pushed
7848251d9a6c: Pushed
1dfd2148097e: Pushed
received unexpected HTTP status: 500 Internal Server Error
=!= Build failed due to an error:
=!= push step: exit status 1
If this persists, please contact us at https://help.heroku.com/.