add .deepsurce.toml (ethersphere#99)

Author: Ivan Vandot

.deepsource.toml

@@ -0,0 +1,18 @@
+version = 1
+
+test_patterns = ["**/*_test.go"]
+
+[[analyzers]]
+name = "go"
+enabled = true
+
+  [analyzers.meta]
+  import_path = "github.com/ethersphere/bee"
+
+[[analyzers]]
+name = "test-coverage"
+enabled = true
+
+[[analyzers]]
+name = "docker"
+enabled = true