fix(db-manager): fix immutability issue of db config so that it can be extended

docker-compose.yml

@@ -39,6 +39,7 @@ services:
       - POSTGRES_DB=${POSTGRES_DB:-test_db}
       - POSTGRES_USER=${POSTGRES_USER:-test_user}
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-password}
+      - POSTGRES_ALLOW_SELF_SIGNED_CERTIFICATES=1
       - PUBSWEET_SECRET=${PUBSWEET_SECRET:-theSecret}
       - SERVER_PORT=${SERVER_PORT:-3000}
       # - CLIENT_URL=${CLIENT_URL:-http://0.0.0.0:4000////}

src/dbManager/connectionConfig.js

@@ -2,9 +2,11 @@ const config = require('config')
 
 const { isEnvVariableTrue } = require('../utils/env')
 
-const connection =
-  process.env.DATABASE_URL ||
-  (config['pubsweet-server'] && config['pubsweet-server'].db)
+const connectionConfig =
+  config['pubsweet-server'] && config['pubsweet-server'].db
+
+// clone to allow mutation for the case of adding ssl
+const connection = process.env.DATABASE_URL || { ...connectionConfig }
 
 if (isEnvVariableTrue(process.env.POSTGRES_ALLOW_SELF_SIGNED_CERTIFICATES)) {
   if (!connection.ssl) connection.ssl = {}