added psycopg2-binary as a dependency

requirements.txt

@@ -36,6 +36,7 @@ numpy==1.19.1
 packaging==20.4
 Pillow==7.2.0
 pkg-resources==0.0.0
+psycopg2-binary==2.8.6
 pycparser==2.20
 pyparsing==2.4.7
 python-dateutil==2.8.1