Drone - try using local Dockerfile

.drone.yml

@@ -4,8 +4,16 @@ type: docker
 name: default
 
 steps:
+- name: xelatex
+  image: docker:dind
+  volumes:
+    - name: dockersock
+      path: /var/run/docker.sock
+  commands:
+    - docker build -t xelatex .
 - name: resume
-  image: tianon/latex
+  pull: never
+  image: xelatex:latest 
   commands:
     - xelatex resume.tex
 - name: release