#814 Docker deploy fixes

Jenkinsfile

@@ -31,15 +31,15 @@ node {
         }
     }
     stage ('Docker deployment') {
-        environment {
-            COMPOSE_HTTP_TIMEOUT = 300
-            COMPOSE_PROJECT_NAME = 'salix'
-            DOCKER_TLS_VERIFY = 1
-        }
-
-        sh "docker-compose build"
-
         withCredentials([dockerCert(credentialsId: 'docker', variable: 'DOCKER_CERT_PATH')]) {
+            environment {
+                COMPOSE_HTTP_TIMEOUT = 300
+                COMPOSE_PROJECT_NAME = 'salix'
+                DOCKER_TLS_VERIFY = 1
+            }
+
+            sh "docker-compose build"
+
             env.DOCKER_HOST = 'tcp://vch2.verdnatura.es:2376';
             sh "docker-compose up -d"
         }