Update Jenkinsfile

Jenkinsfile

@@ -6,6 +6,10 @@ pipeline {
                 PATH = "/var/lib/jenkins/.cargo/bin:${env.PATH}"
             }
             steps {
+                // Clean workspace. TODO: Separate backend & frontend build
+                cleanWs()
+                checkout scm
+
                 dir("backend") {
                     sh "touch .env"
                     sh "echo DATABASE_URL=mysql://educa7ls_user:123456789a*@md-89.webhostbox.net:3306/educa7ls_plataforma >> .env"