Added job list container. Removed all previous migrations.

hasura/migrations/1575616993057_create_table_public_masterdata/down.yaml

@@ -0,0 +1,3 @@
+- args:
+    sql: DROP TABLE "public"."masterdata"
+  type: run_sql

hasura/migrations/1575616993057_create_table_public_masterdata/up.yaml

@@ -0,0 +1,8 @@
+- args:
+    sql: CREATE TABLE "public"."masterdata"("key" text NOT NULL, "value" jsonb NOT
+      NULL, PRIMARY KEY ("key") );
+  type: run_sql
+- args:
+    name: masterdata
+    schema: public
+  type: add_existing_table_or_view