Ruby SDK Dockerfile (#72)

Ruby SDK Dockerfile

Co-authored-by: Mamoon Raja <[email protected]>

Author: germanattanasio

docker/Dockerfile

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+#Import Ruby base image(change version as needed)
+FROM ruby:2.6.3
+
+#Install Ruby SDK
+RUN gem install ibm_watson

docker/README.md

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+## Docker
+You can use docker to test issues you have with the SDK.
+
+1.  Install docker
+    -   Mac: <https://docs.docker.com/docker-for-mac/install/>
+    -   Windows: <https://docs.docker.com/docker-for-windows/install/>
+
+2.  Download the dockerfile for this SDK and edit as needed.
+    -   Change the ruby version as needed `FROM ruby:<your-version>`
+        -   For valid ruby base images on docker see <https://hub.docker.com/_/ruby>
+
+    -   Copy code/file that you wish to test into the dockerfile 
+        -   Add line `COPY <src>... <dest>`
+
+    -   Set dockerfile to execute code file 
+        -   Add line `CMD [ "<executable>" ]`
+    
+    -   For more information on dockerfile construction please visit <https://docs.docker.com/engine/reference/builder/>
+
+3.  Build and run the docker image.
+    -   Navigate to docker file directory
+    -   To build the docker image run `docker build --tag=<your-tag> .`
+    -   To run the docker image run `docker run <your-tag>`