Add BE deployment script

[ainefairbrother]

This script automates the BE deployment process.

Use-case is if you make a change to the BE code and need to build image and push to GC docker repository and have the changes reflected on the dev or prod website.
The script has a --dry-run mode to verify what will be run.

Deploy to dev

cd igsr-be
./scripts/deploy_igsr_be.sh \
	--path . \
	--env dev \
	--config ./scripts/config.ini  \
	--dry-run

Deploy to prod

cd igsr-be
./scripts/deploy_igsr_be.sh \
	--path . \
	--env prod \
	--config ./scripts/config.ini \
	--dry-run

Where config.ini looks like:

ES_CLOUD_ID=
ES_API_KEY=