Add knex SSL configuration support

backend/src/db/instance.ts

@@ -1,11 +1,23 @@
 import knex from "knex";
 
 export type TDbClient = ReturnType<typeof initDbConnection>;
-export const initDbConnection = (dbConnectionUri: string) => {
+export const initDbConnection = ({
+  dbConnectionUri,
+  dbRootCert
+}: {
+  dbConnectionUri: string;
+  dbRootCert?: string;
+}) => {
   const db = knex({
     client: "pg",
-    connection: dbConnectionUri
+    connection: {
+      connectionString: dbConnectionUri,
+      ssl: dbRootCert ? {
+        rejectUnauthorized: true,
+        ca: Buffer.from(dbRootCert, 'base64').toString('ascii')
+      } : false
+    }
   });
 
   return db;
-};
+};