The universal bash script to start Docker container or image

start-docker

#!/usr/bin/bash

# This is a bash script for backend serving
# using the Docker
#
# Author: Yukal Alexander <[email protected]>
# License MIT
# Version: 3.0

# Set variables
APP_NAME=${PWD##*/}
APP_IMAGE=$APP_NAME:backend
NODE_IMAGE=node:11-alpine
PORTS=5000:5000
WORKDIR=/home/node

IMAGE_ID=$(docker image ls -q "${APP_NAME}")

# Dockerfile Contents
read -r -d '' DOCKERFILE << EOM
FROM $NODE_IMAGE
WORKDIR $WORKDIR
RUN apk update \
 && apk upgrade \
 && apk --no-cache add --virtual bash \
 && apk --no-cache add --virtual mc \
 && apk --no-cache add --virtual native-deps\
 && apk --no-cache add --virtual g++ \
 && apk --no-cache add --virtual gcc \
 && apk --no-cache add --virtual libgcc \
 && apk --no-cache add --virtual libstdc++ \
 && apk --no-cache add --virtual linux-headers \
 && apk --no-cache add --virtual make\
 && apk --no-cache add --virtual python \
 && npm i -g --unsafe-perm node-gyp \
 && apk del native-deps
EOM

if [ -z "$IMAGE_ID" ]; then
    echo "CREATE IMAGE FROM {$APP_IMAGE}";
    docker build - <<< "${DOCKERFILE}" --tag $APP_IMAGE
fi

# Get container ID and state of the Docker image
CONTAINER_ID=$(docker ps -q -a -f name="${APP_NAME}")
if [ -z "$CONTAINER_ID" ];
    then CONTAINER_STATE=false
    else CONTAINER_STATE=$(docker inspect -f {{.State.Running}} $CONTAINER_ID)
fi

# Set arguments for Docker
if [ -z "$1" ];
    then ARG="bash";
    else ARG="$1";
fi

if [ -z "$CONTAINER_ID" ]; then
    # Container hasn't found. Run it from an image
    docker run -it --rm --name $APP_NAME -p "${PORTS}" \
        -network default \
        -v "${PWD}":"${WORKDIR}" \
        -w "${WORKDIR}" $APP_IMAGE $ARG
else
    # Container has found. Run it from the container
    if [ "$CONTAINER_STATE" == "true" ]; then
        docker exec -it $CONTAINER_ID $ARG
    else
        docker container start -ai $CONTAINER_ID
    fi
fi