change to jobs seed - only seed new jobs

server/xpub-model/seeds/jobs_seed.js

 exports.seed = async (knex, Promise) => {
-  await knex('config.job').del()
   const midnight = new Date()
   midnight.setHours(0, 0, 0, 0)
-  await knex('config.job').insert([
+  const seeds = [
     {
       name: 'tagging-alert',
       running: false,
@@ -110,5 +109,16 @@ exports.seed = async (knex, Promise) => {
       frequency: '0 5 * * 0,3',
       description: 'Updates the local NLM Catalog-based journal list',
     },
-  ])
+  ]
+
+  // Inserts seed entries if name not already in database
+  seeds.reduce(async (promise, seed) => {
+    await promise
+    const rows = await knex('config.job')
+      .select()
+      .where('name', seed.name)
+
+    if (rows.length === 0) return knex('config.job').insert(seed)
+    return Promise.resolve()
+  }, Promise.resolve())
 }