- feat: Sales estimates APIs.

- feat: Sales invoices APIs.
- feat: Sales receipts APIs.
- WIP: Sales payment receipts.
- WIP: Purchases bills.
- WIP: Purchases payments made.

server/src/database/migrations/20200713192127_create_sales_estimates_table.js

@@ -0,0 +1,18 @@
+
+exports.up = function(knex) {
+  return knex.schema.createTable('sales_estimates', (table) => {
+    table.increments();
+    table.integer('customer_id').unsigned();
+    table.date('estimate_date');
+    table.date('expiration_date');
+    table.string('reference');
+    table.string('estimate_number');
+    table.text('note');
+    table.text('terms_conditions');
+    table.timestamps();
+  });  
+};
+
+exports.down = function(knex) {
+  return knex.schema.dropTableIfExists('sales_estimates');
+};