Add Dockerfile and drone config

Adds a Dockerfile that builds the project, and a drone pipeline to push
the docker image to the docker hub.

.drone.yml

@@ -0,0 +1,12 @@
+kind: pipeline
+name: default
+
+steps:
+- name: docker
+  image: plugins/docker
+  settings:
+    repo: egraven/tidy-html5
+    auto_tag: true
+    username: egraven
+    password:
+      from_secret: DOCKER_TOKEN

Dockerfile

@@ -0,0 +1,15 @@
+FROM debian:stable-slim AS builder
+RUN apt-get update -y && \
+	apt-get install -y git cmake make build-essential gcc
+
+WORKDIR /build
+COPY . .
+
+RUN cd build/cmake
+RUN cmake /app -DCMAKE_BUILD_TYPE=Release 
+RUN make
+RUN make install
+
+FROM debian:stable-slim AS runtime
+COPY --from=builder /usr/local/bin/tidy /usr/local/bin/tidy
+ENTRYPOINT [ "/usr/local/bin/tidy" ]

README.md

@@ -1,3 +1,7 @@
+[![Build Status](https://drone.data.coop/api/badges/emelie/tidy-html5/status.svg?ref=refs/heads/next)](https://drone.data.coop/emelie/tidy-html5)
+
+## Forked from [https://github.com/htacg/tidy-html5](https://github.com/htacg/tidy-html5)
+
 # HTACG HTML Tidy
 
 All other READMEs and related materials can be found in [README/][100]. Although all of our materials should be linked in this README, be sure to check this directory for documents we’ve not yet added to this document.