Unable to perform docker run using Invoke-command - powershell

Question

i'm new to docker. I run docker "natively" from a Windows server 2016 with a Windows container, there is no intermediate VM (no docker machine) in between and no docker toolbox, so the "host" is the actual Windows Server that I run docker on.
Docker version:
PS C:> docker version
Client:
Version: 17.03.1-ee-3
API version: 1.27
Go version: go1.7.5
Git commit: 3fcee33
Built: Thu Mar 30 19:31:22 2017
OS/Arch: windows/amd64
Server:
Version: 17.03.1-ee-3
API version: 1.27 (minimum version 1.24)
Go version: go1.7.5
Git commit: 3fcee33
Built: Thu Mar 30 19:31:22 2017
OS/Arch: windows/amd64
Experimental: false
PS C:>
i pulled the image from docker hub. I need to replace the files inside the docker image while running and commit changes to the image.
Lets say i have Sample.java and datafile.properties inside the docker image which i pulled from docker hub.
i want to replace that with Hello.java and data.properties[ i pulled these files from github]
how would i do that in an automated way? Any advise and some examples on this would he helpful. Thanks in advance.

Answer 1

The best way to build an image automated, is to use a Dockerfile. Some information can be found in the documentation, for example; https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/
If you have your Hello.java and datafile.properties in a directory, create a Dockerfile in the same directory, e.g.;
FROM the-base-image-on-docker-hub
RUN rm /path/to/Sample.java
COPY ./Hello.java /path/to/
COPY ./datafile.properties /path/to/
You can then build your image, and "tag" it as myimage:latest with;
docker image build -t myimage:latest .
(the period at the end (.) indicates; use the current directory as "build context" - the build context is uploaded to the docker daemon, and everything in it will be accessible to add to your docker image using the COPY or ADD Dockerfile instructions)
This is a very naive example, just to illustrate the concept; I suggest reading the documentation, to understand the concept, and searching for more examples.