Added docker support (#55)

* chore(repo): added docker support

* docs(readme): added docker instruction

* refactor(docker): build from current branch

* fix(docker): remove unnecessary packages

Co-authored-by: Frank Denis <124872+jedisct1@users.noreply.github.com>

.dockerignore

@@ -0,0 +1,5 @@
+**
+
+!/share
+!/src
+!/CMakeLists.txt

Dockerfile

@@ -0,0 +1,18 @@
+FROM alpine:3.9 as build
+
+WORKDIR /usr/src/minisign
+
+RUN apk add --no-cache \
+    g++==8.3.0-r0 \
+    libsodium-dev==1.0.16-r0
+
+COPY ./ ./
+
+RUN gcc -static -Os -s -o minisign src/*.c -lsodium
+
+
+FROM scratch
+
+COPY --from=build /usr/src/minisign/minisign /usr/local/bin/
+
+ENTRYPOINT ["/usr/local/bin/minisign"]

README.md

@@ -53,6 +53,10 @@ Minisign is also available on Ubuntu as a PPA:
 
     $ [sudo] add-apt-repository ppa:dysfunctionalprogramming/minisign
 
+Minisign is also available with docker:
+
+    $ docker run -i --rm jedisct1/minisign
+
 Additional tools, libraries and implementations
 -----------------------------------------------