[backend] add basic files for deploying and extending backend operations

backend/src/main.py

@@ -0,0 +1,28 @@
+from flask import Flask
+import psycopg2 as psql
+from os import environ as env
+
+app = Flask(__name__)
+
+db_params = {
+    'database': env.get('DB_NAME'),
+    'user': env.get('DB_USER'),
+    'password': env.get('DB_PASS'),
+    'host': env.get('DB_HOST'),
+    'port': int(env.get('DB_PORT'))
+}
+
+db = psql.connect(**db_params)
+
+@app.route("/")
+def test():
+    c = db.cursor()
+    try:
+        c.execute('SELECT * FROM movies')
+    except Exception:
+        db.rollback()
+        return "Failed to fetch table 'movies'"
+
+    res = c.fetchmany(10)
+    c.close()
+    return "<p>Hello, World! test data:<br>" + "<br>".join(str(i) for i in res) + "</p>"