run ES on github actions

.github/workflows/main.yml

@@ -37,6 +37,17 @@ jobs:
           - blockchain
           - other
     steps:
+      - name: Configure sysctl limits
+        run: |
+                sudo swapoff -a
+                sudo sysctl -w vm.swappiness=1
+                sudo sysctl -w fs.file-max=262144
+                sudo sysctl -w vm.max_map_count=262144
+
+      - name: Runs Elasticsearch
+        uses: elastic/elastic-github-actions/elasticsearch@master
+        with:
+                stack-version: 7.6.0
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v1
         with: