Updated sample env

.env.sample

 RESTART=no
 DEV_PORT=8080
-DB_PASSWORD=insert-random-string-here
+POSTGRES_PASSWORD=insert-random-string-here
+POSTGRES_USER=aggregate
+POSTGRES_DB=aggregate
+DB_HOST=db
+
+AGG_VERS=2.0.5
+CATALINA_HOME=/usr/local/tomcat
+HOST_NAME=localhost