Add libgcrypt to Dockerfile

.dockerignore

+.git
+.gitignore
+Dockerfile
+.dockerignore
+.idea

Dockerfile

@@ -7,6 +7,7 @@ RUN apt-get install -y automake
 RUN apt-get install -y autoconf
 RUN apt-get install -y libtool
 RUN apt-get install -y autoconf-archive
+RUN apt-get install -y libgcrypt20-dev
 
 ADD . /audiowmark
 WORKDIR /audiowmark
@@ -15,4 +16,7 @@ RUN ./autogen.sh
 RUN make
 RUN make install
 
+VOLUME ["/data"]
+WORKDIR /data
+
 ENTRYPOINT ["/usr/local/bin/audiowmark"]

README

@@ -27,4 +27,4 @@ You should be able to execute audiowmark via Docker.
 Example that outputs the usage message:
 
   docker build -t audiowmark .
-  docker run -it audiowmark -h
+  docker run -v <local-data-directory>:/data -it audiowmark -h