init app py with streamlit

app.py

@@ -0,0 +1,17 @@
+import streamlit as st
+
+st.title("Hello Streamlit-er 👋")
+st.markdown(
+    """ 
+    This is a playground for you to try Streamlit and have fun. 
+
+    **There's :rainbow[so much] you can build!**
+    
+    We prepared a few examples for you to get started. Just 
+    click on the buttons above and discover what you can do 
+    with Streamlit. 
+    """
+)
+
+if st.button("Send balloons!"):
+    st.balloons()