Shell script to alias Sqitch running in a Docker container

sqitch.sh

#!/usr/bin/env bash
#
# Dockerized Sqitch made easier
# 
# References:
#   Sqitch - https://metacpan.org/pod/sqitchtutorial
#   Docker Image - https://hub.docker.com/r/jmabey/sqitch/
# Configuration:
#   Add a .env file in same directory and configure it.
#
#    # Names to identify images and containers of this app
#    IMAGE_NAME='jmabey/sqitch:postgres'
#    CONTAINER_NAME="sqitch"
#    
#    # PG Container Info
#    PGHOST="postgres_container_name"
#    PGUSER="postgres_user"
#    PGPASSWORD="postgres_password"
#    PGDATABASE="postgres_database"
#    
#    # Sqitch specific
#    PROJECT_NAME="projects_name"
#    PROJECT_DIR="/path/to/sqitch/project"
#    PROJECT_REPO="http://myprojectrepo/"
#
# Usage:
# 
#   ./sqitch.sh add poject_schema -n "Initial schema for project"
#   ./sqitch.sh status
#

# export vars from .env file
set -a 
source .env
set +a 

# Verify all vars set in .env file
if [ -z ${IMAGE_NAME+x} ]; then echo "IMAGE_NAME is not configured in the .env file."; exit 1; fi
if [ -z ${CONTAINER_NAME+x} ]; then echo "CONTAINER_NAME is not configured in the .env file."; exit 1; fi
if [ -z ${PGHOST+x} ]; then echo "PGHOST is not configured in the .env file."; exit 1; fi
if [ -z ${PGUSER+x} ]; then echo "PGUSER is not configured in the .env file."; exit 1; fi
if [ -z ${PGPASSWORD+x} ]; then echo "PGPASSWORD is not configured in the .env file."; exit 1; fi
if [ -z ${PGDATABASE+x} ]; then echo "PGDATABASE is not configured in the .env file."; exit 1; fi
if [ -z ${PROJECT_NAME+x} ]; then echo "PROJECT_NAME is not configured in the .env file."; exit 1; fi
if [ -z ${PROJECT_DIR+x} ]; then echo "PROJECT_DIR is not configured in the .env file."; exit 1; fi
if [ -z ${PROJECT_REPO+x} ]; then echo "PROJECT_REPO is not configured in the .env file."; exit 1; fi

# default docker run command
docker run -it --rm \
        -v $PROJECT_DIR:/src \
        --env PGHOST=$PGHOST \
        --env PGUSER=$PGUSER \
        --env PGPASSWORD=$PGPASSWORD \
        --env PGDATABASE=$PGDATABASE \
        --network container:$PGHOST \
        $IMAGE_NAME "$@"