move creating the config file to a js file

const { promisify } = require("util");

const {

  HOST,

  PORT,

  KEY_LENGTH,

  MAX_LENGTH,

  STATIC_MAX_AGE,

  RECOMPRESS_STATIC_ASSETS,

  STORAGE_TYPE,

  STORAGE_HOST,

  STORAGE_PORT,

  STORAGE_EXPIRE_SECONDS,

  STORAGE_DB,

  STORAGE_AWS_BUCKET,

  STORAGE_AWS_REGION,

  STORAGE_PG_PASSWORD,

  STORAGE_PG_USERNAME,

  LOGGING_LEVEL,

  LOGGING_TYPE,

  LOGGING_COLORIZE,

  KEYGENERATOR_TYPE,

  KEY_GENERATOR_KEYSPACE,

  RATE_LIMITS_NORMAL_TOTAL_REQUESTS,

  RATE_LIMITS_NORMAL_EVERY_SECONDS,

  RATE_LIMITS_WHITELIST_TOTAL_REQUESTS,

  RATE_LIMITS_WHITELIST_EVERY_SECONDS,

  RATE_LIMITS_WHITELIST,

  RATE_LIMITS_BLACKLIST_TOTAL_REQUESTS,

  RATE_LIMITS_BLACKLIST_EVERY_SECONDS,

  RATE_LIMITS_BLACKLIST,

  DOCUMENTS,

} = process.env;

const config = {

  host: HOST,

  port: PORT,

  keyLength: KEY_LENGTH,

  maxLength: MAX_LENGTH,

  staticMaxAge: STATIC_MAX_AGE,

  recompressStaticAssets: RECOMPRESS_STATIC_ASSETS,

  logging: [

    {

      level: LOGGING_LEVEL,

      type: LOGGING_TYPE,

      colorize: LOGGING_COLORIZE,

    },

  ],

  keyGenerator: {

    type: KEYGENERATOR_TYPE,

    keyspace: KEY_GENERATOR_KEYSPACE,

  },

  rateLimits: {

    whitelist: RATE_LIMITS_WHITELIST ? RATE_LIMITS_WHITELIST.split(",") : [],

    blacklist: RATE_LIMITS_BLACKLIST ? RATE_LIMITS_BLACKLIST.split(",") : [],

    categories: {

      normal: {

        totalRequests: RATE_LIMITS_NORMAL_TOTAL_REQUESTS,

        every: RATE_LIMITS_NORMAL_EVERY_SECONDS,

      },

      whitelist:

        RATE_LIMITS_WHITELIST_EVERY_SECONDS ||

        RATE_LIMITS_WHITELIST_TOTAL_REQUESTS

          ? {

              totalRequests: RATE_LIMITS_WHITELIST_TOTAL_REQUESTS,

              every: RATE_LIMITS_WHITELIST_EVERY_SECONDS,

            }

          : null,

      blacklist:

        RATE_LIMITS_BLACKLIST_EVERY_SECONDS ||

        RATE_LIMITS_BLACKLIST_TOTAL_REQUESTS

          ? {

              totalRequests: RATE_LIMITS_WHITELIST_TOTAL_REQUESTS,

              every: RATE_LIMITS_BLACKLIST_EVERY_SECONDS,

            }

          : null,

    },

  },

  storage: {

    type: STORAGE_TYPE,

    host: STORAGE_HOST,

    port: STORAGE_PORT,

    expire: STORAGE_EXPIRE_SECONDS,

    bucket: STORAGE_AWS_BUCKET,

    region: STORAGE_AWS_REGION,

    connectionUrl: `postgres://${STORAGE_PG_USERNAME}:${STORAGE_PG_PASSWORD}@${STORAGE_HOST}:${STORAGE_PORT}/${STORAGE_DB}`,

    db: STORAGE_DB,

  },

  documents: DOCUMENTS

    ? DOCUMENTS.split(",").reduce((acc, item) => {

        const keyAndValueArray = item.replace(/\s/g, "").split("=");

        return { ...acc, [keyAndValueArray[0]]: keyAndValueArray[1] };

      }, {})

    : null,

};

console.log(JSON.stringify(config));

# We use this file to translate environmental variables to .env files used by the application

set -e

function create_document_string () {

    IFS=',' read -ra doc_array <<< "$DOCUMENTS"

    document_string="{"

    for i in "${doc_array[@]}"

    do

        IFS='=' read -ra document <<< "$i"

        document_string+="\"${document[0]}\": \"${document[1]}\","

    done

    # Remove trailing "," 

    [[ "$document_string" == *, ]] && document_string=${document_string::${#document_string}-1}

    document_string+="}"

    echo $document_string

}

document_string=$(create_document_string)

echo "

{

  \"host\": \"$HOST\",

  \"port\": ${PORT},

  \"keyLength\": $KEY_LENGTH,

  \"maxLength\": $MAX_LENGTH,

  \"staticMaxAge\": $STATIC_MAX_AGE,

  \"recompressStaticAssets\": $RECOMPRESS_STATIC_ASSETS,

  \"logging\": [

    {

      \"level\": \"$LOGGING_LEVEL\",

      \"type\": \"$LOGGING_TYPE\",

      \"colorize\": $LOGGING_COLORIZE

    }

  ],

  \"keyGenerator\": {

    \"type\": \"$KEYGENERATOR_TYPE\"

  },

  \"rateLimits\": {

    \"categories\": {

      \"normal\": {

        \"totalRequests\": $RATELIMITS_NORMAL_TOTAL_REQUESTS,

        \"every\": $RATELIMITS_NORMAL_EVERY_SECONDS

      },

      \"whitelist\": {

        \"totalRequests\": $RATELIMITS_WHITELIST_TOTAL_REQUESTS,

        \"every\": $RATELIMITS_WHITELIST_EVERY_SECONDS

      },

      \"blacklist\": {

        \"totalRequests\": $RATELIMITS_BLACKLIST_TOTAL_REQUESTS,

        \"every\": $RATELIMITS_BLACKLIST_EVERY_SECONDS

      }

    }

  },

  \"storage\": {

    \"type\": \"$STORAGE_TYPE\",

    \"host\": \"$STORAGE_HOST\",

    \"port\":  $STORAGE_PORT,

    \"expire\": $STORAGE_EXPIRE_SECONDS,

    \"db\": $STORAGE_DB

  },

  \"documents\": $document_string

}

" > config.js

node ./docker-entrypoint.js > ./config.js

exec "$@"

 No newline at end of file