Implemented basic webservice (hello-world style)

requirements.txt

@@ -0,0 +1 @@
+Flask==1.0.2

slider.py

@@ -0,0 +1,12 @@
+#!/usr/bin/python3
+
+from flask import Flask
+
+app = Flask(__name__)
+
+@app.route("/")
+def hello():
+    return "Hello slider"
+
+if __name__ == "__main__":
+    app.run()