travis: A few more Docker updates

* Use `docker` instead of `podman`

* Use `$(pwd)` wherever possible as opposed to `.`

Signed-off-by: mr.Shu <[email protected]>

.travis.yml

@@ -17,12 +17,12 @@ cache:
     - $HOME/.texlive
 
 script:
-  - docker run -v .:/documents asciidoctor/docker-asciidoctor .ci/adoc-to-tex.sh rules
-  - docker run -v .:/documents mrshu/texlive-dblatex .ci/tex-to-pdf.sh rules
+  - docker run -v $(pwd):/documents asciidoctor/docker-asciidoctor .ci/adoc-to-tex.sh rules
+  - docker run -v $(pwd):/documents mrshu/texlive-dblatex .ci/tex-to-pdf.sh rules
 
   # Same thing for superteam rules
-  - docker run -v .:/documents asciidoctor/docker-asciidoctor .ci/adoc-to-tex.sh superteam_rules
-  - docker run -v .:/documents mrshu/texlive-dblatex .ci/tex-to-pdf.sh superteam_rules
+  - docker run -v $(pwd):/documents asciidoctor/docker-asciidoctor .ci/adoc-to-tex.sh superteam_rules
+  - docker run -v $(pwd):/documents mrshu/texlive-dblatex .ci/tex-to-pdf.sh superteam_rules
 
 after_error:
   - docker logs asciidoc-to-html

README.md

@@ -74,8 +74,9 @@ If you'd like to try it on your own, it should not be such a big problem,
 provided you have [Docker](https://docker.com) installed. You can then go
 thorugh the build process in two easy steps:
 
-       podman run -v .:/documents asciidoctor/docker-asciidoctor .ci/adoc-to-tex.sh rules
-       podman run -v .:/documents mrshu/texlive-dblatex .ci/tex-to-pdf.sh rules
+       docker run -v $(pwd):/documents asciidoctor/docker-asciidoctor .ci/adoc-to-tex.sh rules
+       docker run -v $(pwd):/documents mrshu/texlive-dblatex .ci/tex-to-pdf.sh rules
 
-Which will make the `rules.adoc` file go through the build steps above and
-generate files `rules.html` and `rules.pdf` as a result.
+Which will make the `rules.adoc` file (in the current working directory --
+that's the `$(pwd)` part) go through the build steps above and generate files
+`rules.html` and `rules.pdf` as a result.