improve readme

README.md

@@ -1,3 +1,5 @@
+# kwkhtmltopdf
+
 A [wkhtmlpdf](https://wkhtmltopdf.org) server with drop-in client.
 
 Why?
@@ -7,22 +9,22 @@ Why?
   memory hungry wkhtmltopdf jobs to dedicated pods
 - easily select the wkhtmltopdf version to use at runtime
 
-# WARNING
+## WARNING
 
 The server is not meant to be exposed to untrusted clients.
 
 Several attack vectors exist (local file access being the most obvious).
 Mitigating them is not a priority, since the main use case is
 to use it as a private service.
 
-# kwkhtmltopdf_server
+## kwkhtmltopdf_server
 
 A web server accepting [wkhtmlpdf](https://wkhtmltopdf.org) options and files
 to convert as multipart form data.
 
 It is written in go.
 
-# kwkhtmltopdf_client
+## kwkhtmltopdf_client
 
 A drop-in replacement for [wkhtmlpdf](https://wkhtmltopdf.org) which invokes
 the above server defined in the `KWKHTMLTOPDF_SERVER_URL` environment variable.
@@ -33,9 +35,9 @@ There are two clients:
 * a python client, which only depends on the `requests` library.
   It should work with any python version supported by `requests`.
 
-# Quick start
+## Quick start
 
-## Run the server
+### Run the server
 
 ```
 $ docker run --rm -p 8080:8080 acsone/kwhkhtmltopdf
@@ -49,7 +51,7 @@ $ go run server/kwkhtmltopdf_server.go
 
 The server should now listen on http://localhost:8080.
 
-## Run the client
+### Run the client
 
 ```
 $ go build -o client/go/kwkhtmltopdf_client client/go/kwkhtmltopdf_client.go
@@ -66,7 +68,7 @@ $ env KWKHTMLTOPDF_SERVER_URL=http://localhost:8080 \
 
 This should generate a printout of the wkhtmltopdf home page to /tmp/test.pdf.
 
-# Run tests
+## Run tests
 
 1. Start the server.
 2. Set and export `KWKHTMLTOPDF_SERVER_URL` environment variable.
@@ -75,12 +77,12 @@ This should generate a printout of the wkhtmltopdf home page to /tmp/test.pdf.
 This will run the same tests against the the native wkhtmltopdf executable,
 as well as against the server using the python and go clients.
 
-# Roadmap
+## Roadmap
 
 See [issues on GitHub](<https://github.com/acsone/kwkhtmltopdf/issues>)
 as well as some TODO's in the source code.
 
-# Releasing
+## Releasing
 
 Push the master branch and ensure tests pass on travis.
 
@@ -90,14 +92,14 @@ Travis will create a GitHub release with the client and server binaries.
 
 [Docker Hub](https://cloud.docker.com/u/acsone/repository/docker/acsone/kwkhtmltopdf) will build the images.
 
-# Credits
+## Credits
 
 Author: stephane.bidoul@acsone.eu.
 
 Contributors:
 
 * Nils Hamerlinck
 
-# License
+## License
 
 MIT