Adding sample dag to target

examples/sample_dag.json

@@ -0,0 +1,32 @@
+{
+  "config": {
+    "timeout": 3600,
+    "executor": "local"
+  },
+  "parameter_list": {
+    "DATE": [],
+    "SOURCE": ""
+  },
+  "tasks": [
+    {
+      "name": "pull_data_a",
+      "max_retries": 3,
+      "retry_delay_seconds": 600,
+      "command": "/path/to/pull.sh --date {DATE} --source {SOURCE}_A",
+      "verification_command": "/path/to/pull_verify.sh --date {DATE} --source {SOURCE}_A",
+      "timeout_seconds": 30
+    },
+    {
+      "name": "pull_data_b",
+      "max_retries": 3,
+      "retry_delay_seconds": 600,
+      "command": "/path/to/pull.sh --date {DATE} --source {SOURCE}_B",
+      "verification_command": "/path/to/pull_verify.sh --date {DATE} --source {SOURCE}_B",
+      "timeout_seconds": 30
+    },
+    {
+      "name": "merge_data",
+      "command": "/path/to/merge.sh --left {SOURCE}_A --right {SOURCE}_B"
+    }
+  ]
+}