Revert "remove liquibase"

This reverts commit 43917c0

build.gradle

@@ -104,6 +104,9 @@ dependencies {
 
     compile group: 'postgresql', name: 'postgresql', version: '9.1-901.jdbc4'
 
+    compile group: 'org.liquibase', name: 'liquibase-core', version: '3.5.3'
+    compile group: 'com.mattbertolini', name: 'liquibase-slf4j', version: '2.0.0'
+
     compile group: 'org.apache.poi', name: 'poi', version: '3.9'
     compile group: 'org.apache.poi', name: 'poi-ooxml', version: '3.9'
 

src/main/resources/application.properties

@@ -26,7 +26,11 @@ spring.datasource.url=jdbc:postgresql://localhost:5432/ng-tracker
 spring.datasource.username=postgres
 spring.datasource.password=postgres
 spring.datasource.driverclassName=org.postgresql.Driver
-spring.jpa.hibernate.ddl-auto=update
+spring.jpa.hibernate.ddl-auto=validate
+# Liquibase Settings
+liquibase.drop-first=false
+liquibase.enabled=true
+liquibase.change-log=classpath:db/changelog-master.xml
 # Application Settings
 ng-tracker.base-url=https://127.0.0.1:8443
 ng-tracker.undead-user-login=admin