add postgres extra config argument

Author: hank-cp

README.md

@@ -11,9 +11,11 @@ See [action.yml](action.yml)
 Basic:
 ```yaml
 steps:
-- uses: harmon758/postgresql-action@v1
+- uses: danielweller-swp/postgresql-action@v1
   with:
     postgresql version: '11'  # See https://hub.docker.com/_/postgres for available versions
+    postgresql init scripts: 'init-db'
+    postgresql conf: 'max_prepared_transactions=100'
 ```
 
 # License

action.yml

@@ -27,6 +27,10 @@ inputs:
     description: 'POSTGRES_INIT_SCRIPTS - directory containing DB init scripts'
     required: false
     default: ''
+  postgresql conf:
+    description: 'POSTGRES_CONF - postgres configurations'
+    required: false
+    default: ''
 runs:
   using: 'docker'
   image: 'Dockerfile'

entrypoint.sh

@@ -14,4 +14,9 @@ fi
 
 docker_run="$docker_run -d -p 5432:5432 postgres:$INPUT_POSTGRESQL_VERSION"
 
+if [ ! -z "$INPUT_POSTGRESQL_CONF" ]
+then
+  docker_run="$docker_run -c '$INPUT_POSTGRESQL_CONF'"
+fi
+
 sh -c "$docker_run"