Ao tentar executar o dockerfile ele da o seguinte erro
[+] Building 0.5s (7/8)
=> [internal] load build definition from Dockerfile 0.2s
=> => transferring dockerfile: 370B 0.0s
=> [internal] load .dockerignore 0.2s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/adoptopenjdk/openjdk11:alpine 0.0s
=> [1/4] FROM docker.io/adoptopenjdk/openjdk11:alpine 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 106B 0.0s
=> CACHED [2/4] WORKDIR /opt/app 0.0s
=> ERROR [3/4] RUN gradlew clean 0.3s
------
> [3/4] RUN gradlew clean:
#5 0.232 /bin/sh: gradlew: not found
------
executor failed running [/bin/sh -c gradlew clean]: exit code: 127
------Segue o meu arquivo dockerFile
FROM adoptopenjdk/openjdk11:alpine
MAINTAINER niltonjr
WORKDIR /opt/app
RUN gradlew clean
EXPOSE 8080
ARG JAR_FILE=build/libs/demo-0.1-all.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java", "-jar", "app.jar"]Estou utilizando o windows
