Add pwd command

Author: Angel Barrera

.travis.yml

@@ -37,4 +37,4 @@ after_success:
   # docker login is required if you want to push docker images.
   # DOCKER_PASSWORD should be a secret in your .travis.yml configuration.
   - test -n "${TRAVIS_TAG}" && docker login -u=angelbarrera92 -p="${DOCKER_PASSWORD}"
-  - docker run --rm -v README.md:/data/README.md -e DOCKERHUB_USERNAME=angelbarrera92 -e DOCKERHUB_PASSWORD=${DOCKER_PASSWORD} -e DOCKERHUB_REPO_NAME=basic-auth-reverse-proxy sheogorath/readme-to-dockerhub
+  - docker run --rm -v $(pwd)/README.md:/data/README.md -e DOCKERHUB_USERNAME=angelbarrera92 -e DOCKERHUB_PASSWORD=${DOCKER_PASSWORD} -e DOCKERHUB_REPO_NAME=basic-auth-reverse-proxy sheogorath/readme-to-dockerhub