update readme files

adds postgres readme

database/postgres/README.md

@@ -0,0 +1,16 @@
+# PostgreSQL
+### From their [Website](https://www.postgresql.org/)
+The World's Most Advanced Open Source Relational Database 
+
+### Minimum RAM warning
+2 Gigabytes minimum recommended
+
+See here https://www.commandprompt.com/blog/postgresql_mininum_requirements/
+
+
+### Server Ports
+Ports required to run the server in a table format.
+
+| Port    | default |
+|---------|---------|
+| Server  |  5432   |