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Docker unable to access jar file without docker-compose

as far as I know I only got this answer for my query, but unfortunately I do not have docker-compose.yml I am just trying with plain Dockerfile below is my dockerFile.
FROM openjdk:8-jre-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} ebiPorjectJava.jar
ENTRYPOINT ["java","-jar","/ebiProjectJava.jar"]
but build is getting successful, by below command.
docker build -t ebiproject .
but when I am trying to run the docker it says unable to access jar file
docker run -p 3000:3000 ebiproejct
but it says unable to access jar
I am running docker on windows and I have spring boot application to run
I updated with below one:
FROM openjdk:8-jre-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} /ebiProjectJava.jar
ENTRYPOINT ["java","-jar","/ebiProjectJava.jar"]
but now I am getting corrupted error:

ARG JAR_FILE
expects you to pass the path of the jar_file as docker run argument
Otherwise nothing will be copied to the place, thus java jar won't be able to run the jar.
Check this out: https://vsupalov.com/docker-env-vars/

In this situation you can go in your container with this command:
docker run --rm -it <container_name> <image_name> <command>
you can use bash, ash or sh as
and after entering the container, you can check, run, or any tests in that.

How to copy a jar-file from one docker stage to another with docker onbuild copy?

I'm beginner with Docker, and I'm trying to build an image in two stages.
The first docker-file is uploaded to docker-hub and has the following structure:
FROM openjdk:8-jdk-alpine
ONBUILD COPY app.jar /app.jar
CMD ["java", "-jar", "/app.jar"]
The second dockerfile:
FROM gradle:4.7.0-jdk8-alpine AS build
COPY --chown=gradle:gradle . /home/gradle/src
WORKDIR /home/gradle/src
RUN ./gradlew build
FROM <repo>/<first_docker_file>:1.0
COPY --from=build /home/gradle/src/build/libs/*.jar /app.jar
So I need to build my project -> generate jar file -> copy it to the root directory of the second docker stage of the second docker file.
I need to copy generated jar-file from the first stage to the root directory of the second stage, cause "ONBUILD COPY app.jar /app.jar" is triggered and is waiting for app.jar file in the root directory. The code I have provided in the second file does not work. I also can't change the code of the first docker-file. Do you have any ideas, how can I make it work and what should I change in the second docker file ?

From the ONBUILD reference i understand that the ONBUILD commands are inserted directly after the FROM command when inheriting from it.
As i understand it this means your app.jar needs to exist when the FROM command is issued, i.e. your effective Dockerfile would look like
FROM <repo>/<first_docker_file>:1.0
COPY app.jar /app.jar
COPY --from=build /home/gradle/src/build/libs/*.jar /app.jar
[...]
which obviously wouldn't work.
It seems like your first dockerfile is not meant to be used in a staged build, you need to get the app.jar in the working directory when issuing the build on the first dockerfile, i.e. by compiling inside a container and copying out your app.jar to your first dockerfile location and then build it.

Add jars to Docker image from Plugin Directory

I have a spring boot application which contains a Main Class. I have Docker File as below:
FROM docker.io/openjdk:11-jre-slim
EXPOSE 8082
EXPOSE 8443
ADD target/base-application.jar app.jar
ENV JAVA_OPTS=""
ENTRYPOINT exec java $JAVA_OPTS -Dspring.profiles.active=prod -jar /app.jar
I am creating a Docker image by using this Docker file. Let's consider that this docker file is Docker1.
I have another Spring Boot application (which doesn't have a Main class) with Docker file as below:
FROM Docker1:0.0.1
EXPOSE 8443
ADD target/child-application.jar child-application.jar
ENV JAVA_OPTS=""
ENTRYPOINT exec java $JAVA_OPTS -Dspring.profiles.active=dev -jar /app.jar
I am using Docker1 as a base image for the docker image of 2nd application. I am running the Main class of Docker1 by running 2nd Docker image. Now there are 2 jar files of another spring boot projects(messagepack1.jar & messagepack2.jar). I want to load these jars in the 2nd docker image. I am trying something like this:
FROM Docker1:0.0.1
EXPOSE 8443
COPY src/main/resources/message-packs/messagepack1.jar m1.jar
COPY src/main/resources/message-packs/messagepack2.jar m2.jar
ADD target/child-application.jar child-application.jar
ENV JAVA_OPTS=""
ENTRYPOINT exec java $JAVA_OPTS -Dspring.profiles.active=dev -jar /app.jar
But it is not loading the jars when I am running the 2nd Docker image. Can you please help me out?

Finally, I could find the solution to this problem:
ADD /src/main/resources/message-packs /external-jars
ENTRYPOINT exec java -cp app.jar -Dloader.path=external-jars/ -Dloader.main=com.example.MainClass org.springframework.boot.loader.PropertiesLauncher
Here, I am adding the External Jars from src/main/resources/message-packs directory to the "external-jars" folder of the Docker Image. Then I am loading these jars to the Classpath of my application by using "java -cp" command.

How to start a fat jar in docker?

I want to start my fat JAR inside a Docker container
Docker file
FROM java:8-jre
COPY config.yml /opt/hello/
COPY build/libs/Dockerwizard.jar /opt/hello/
EXPOSE 80
WORKDIR /opt/hello
CMD ["java", "-Xms128m", "-Xmx1500m", "-Dfile.encoding=UTF-8", "-jar", "Dockerwizard.jar", "server", "config.yml"]
Everytime I run
docker build --tag=myapp .
and
docker run -p 18080:8080 -t -i myapp
I get the message
Error: Unable to access jarfile Dockerwizard.jar
How can I resolve this?

It says:
COPY build/libs/Dockerwizard.jar /opt/hello/
...WORKDIR /opt/chat
So you are putting the Jar into /opt/hello, but then you want to run it from /opt/chat.
Maybe you want to look into using consistent path information. Beyond that, when you are not using the -cp option of java, you always have the issue that your CLASSPATH might be incomplete. So try adding -cp . for example.

Try changing the WORKDIR in your Dockerfile
WORKDIR /opt/chat is incorrect
It should be /opt/hello
Update
you have updated the question and renamed /chat to /hello everywhere - so you have made a correction to your error/ mistake

Docker: Dockerize a service that requires mmdb files in /opt/my-service/db folder

I am trying to dockerize a service that requires mmdb files (maxmind db file format) in a particular location /opt/my-service/db
Locally I am able to run the service if I set up my system by copying required mmdb files to the "/opt/my-service/db" folder.
What should I do for the docker? I tried copying the files by creating same file location in the dockerfile ( NOT working) :
FROM tomcat:8-jre8
EXPOSE 8080
COPY ./my-service/target/my-service-1.0-SNAPSHOT.war /usr/local/tomcat/webapps
cmd mkdir -p /opt/my-service/db
copy ./my-service/src/test/resources/* /opt/ipgeo/db/
CMD ["catalina.sh", "run"]
Is this how it should be done?
OR a container should be created? If yes, how?

cmd mkdir will not be run to build the Dockerfile.
So, replace your Dockerfile by this one:
FROM tomcat:8-jre8
EXPOSE 8080
COPY ./my-service/target/my-service-1.0-SNAPSHOT.war /usr/local/tomcat/webapps
RUN mkdir -p /opt/my-service/db
COPY ./my-service/src/test/resources/* /opt/ipgeo/db/
CMD ["catalina.sh", "run"]
Moreover, are you sure that /opt/my-service/db and /opt/ipgeo/db should not be the same string, in this Dockerfile?
If so, the correct Dockerfile should be:
FROM tomcat:8-jre8
EXPOSE 8080
COPY ./my-service/target/my-service-1.0-SNAPSHOT.war /usr/local/tomcat/webapps
RUN mkdir -p /opt/my-service/db
COPY ./my-service/src/test/resources/* /opt/my-server/db/
CMD ["catalina.sh", "run"]