feat: blueprint on Postgres Queries task (#47)

flows/postgres-queries.yaml

@@ -0,0 +1,46 @@
+id: postgres-queries
+namespace: company.team
+
+tasks:
+  - id: init_products
+    type: io.kestra.plugin.jdbc.postgresql.Queries
+    url: "jdbc:postgresql://{{ secret('POSTGRES_HOST') }}:5432/postgres"
+    username: "{{ secret('POSTGRES_USERNAME') }}"
+    password: "{{ secret('POSTGRES_PASSWORD') }}"
+    sql: |
+      CREATE TABLE IF NOT EXISTS products(
+        product_id SERIAL PRIMARY KEY,
+        product_name varchar(100),
+        product_category varchar(50),
+        brand varchar(50)
+      );
+      INSERT INTO products VALUES(1, 'streamline turn-key systems','Electronics','gomez') ON CONFLICT (product_id) DO NOTHING;
+      INSERT INTO products VALUES(2, 'morph viral applications','Household','wolfe') ON CONFLICT (product_id) DO NOTHING;
+      INSERT INTO products VALUES(3, 'expedite front-end schemas','Household','davis-martinez') ON CONFLICT (product_id) DO NOTHING;
+      INSERT INTO products VALUES(4, 'syndicate robust ROI','Outdoor','ruiz-price') ON CONFLICT (product_id) DO NOTHING;
+    fetchType: NONE
+
+extend:
+  title: Use Postgres Queries to run multiple queries
+  description: >-
+    This flow demonstrates using Postgres Queries task to run multiple 
+    queries in a single task.
+
+    This flow can be used a seed flow which can create a table and insert 
+    some sample rows in the table. The flow is idempotent in nature, i.e. 
+    no matter how many times you run the flow, the flow will execute 
+    successfully. Here are the different queries that we execute in the 
+    `init_products` task:
+
+    1. The first query creates `products` table if it does not already exist. 
+    In case it exists, it does nothing.
+
+    2. The next 4 queries inserts data into the table. In case, the row with 
+    the same primary key already exists, it does nothing.
+
+    Thus, the flow can be run multiple times without any side effect.
+  tags:
+    - Postgres
+  ee: false
+  demo: false
+  meta_description: This flow uses Postgres Queries task to run multiple queries.