add db folder and point database files for sqlite to this folder

.gitignore

@@ -12,3 +12,5 @@ production-server
 dump.rdb
 docs/api/static
 **/.DS_Store
+db/*
+!db/.gitkeep

db/.gitkeep

@@ -0,0 +1,2 @@
+# keep this folder in git
+# if you use a file-based databases such as sqlite3, the database files would be stored here

knexfile.js

@@ -4,7 +4,7 @@ module.exports = {
   production: {
     client: env.DB_CLIENT,
     connection: {
-      filename: env.DB_FILENAME,
+      filename: "db/" + env.DB_FILENAME,
       host: env.DB_HOST,
       database: env.DB_NAME,
       user: env.DB_USER,

server/knex.js

@@ -5,7 +5,7 @@ const env = require("./env");
 const db = knex({
   client: env.DB_CLIENT,
   connection: {
-    filename: env.DB_FILENAME,
+    filename: "db/" + env.DB_FILENAME,
     host: env.DB_HOST,
     port: env.DB_PORT,
     database: env.DB_NAME,