feat: update gitignore, add pg version and example env file

.env.dist

@@ -0,0 +1,3 @@
+ODOO_VERSION=17.0
+COMMAND=-d odoo
+PG_VERSION=14.12 #Moved to 14.15 in Odoo 18

.gitignore

@@ -1 +1,5 @@
 .env
+.odoo/
+.enterprise/
+.modules/
+.idea/

docker-compose.yml

@@ -12,7 +12,7 @@ services:
       - ./enterprise:/mnt/enterprise
     command: "odoo ${COMMAND}"
   db:
-    image: postgres:14.12
+    image: "postgres:${PG_VERSION}"
     environment:
       - POSTGRES_DB=postgres
       - POSTGRES_PASSWORD=odoo