Keyclock custom required action not showing up in UI

I am trying to add a custom Keycloak required action to my Keycloak instance
So far I have been adding the following files

• providers/pom.xml
• providers/invitation/pom.xml (parent - child)
• providers/invitation/src/main/java/it/rent/auth/requiredaction/InvitationRequiredAction.java which implements RequiredActionProvider
• providers/invitation/src/main/java/it/rent/auth/requiredaction/InvitationRequiredActionFactory.java which implements RequiredActionFactory
• providers/invitation/src/main/resources/META-INF/services/org.keycloak.authentication.RequiredActionFactory with the following content: it.rent.auth.requiredaction.InvitationRequiredActionFactory

The keycloak Docker file looks like

FROM maven:3-jdk-8-alpine as builder
WORKDIR /build/providers
ENV MODULES="invitation"
RUN for module in $MODULES; do mkdir -p "/build/providers/$module"; done
COPY providers/pom.xml /build/providers/pom.xml
COPY providers/invitation/pom.xml /build/providers/invitation/pom.xml
RUN mvn -B clean
COPY providers /build/providers
RUN mvn -B package
FROM jboss/keycloak:4.8.2.Final

The build output seems promising as it says

[INFO]
[INFO] Providers .......................................... SUCCESS [  0.020 s]
[INFO] invitation ......................................... SUCCESS [  2.449 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

Anyway after landing to the admin dashboard I am not able to see my required action in the required actions list.

What do I miss here?

Thanks to @Evil_skunk to point this out, I forgot to copy my builded jar files to /opt/jboss/keycloak/standalone/deployments.

So I managed to fix this problem by adding the following line at the end ouf my Dockerfile

COPY --from=builder /build/providers/invitation/target/*.jar /opt/jboss/keycloak/standalone/deployments