Using Docker recommended ENTRYPOINT instructions for Dockerfile

[ma-04]

Running the docker image was causing some issues on my end
/usr/local/bin/run-bridge.sh: line 4: $1: unbound variable
Decided to build the image and got the warning even though the build was success. And still got the same error running the docker image.

The warning from docker build

 1 warning found:
 - JSONArgsRecommended: JSON arguments recommended for ENTRYPOINT to prevent unintended behavior related to OS signals (line 26)      
JSON arguments recommended for ENTRYPOINT/CMD to prevent unintended behavior related to OS signals
More info: https://docs.docker.com/go/dockerfile/rule/json-args-recommended/
Dockerfile:26

Fixed/modified based on the recommendation, and the build is working fine.