Add Dockerfile for ImageJ.app

.dockerignore

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+.git

Dockerfile

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+# Development Dockerfile for ImageJ
+# ---------------------------------
+# This dockerfile can be used to build an
+# ImageJ.app directory which can then be run
+# within a number of different Docker images.
+
+# By default, building this dockerfile will use
+# the IMAGE argument below for the runtime image.
+ARG IMAGE=openjdk:8-jre-alpine
+
+# To install the built ImageJ.app into other runtimes
+# pass a build argument, e.g.:
+#
+#   docker build --build-arg IMAGE=openjdk:9 ...
+#
+
+# Similarly, the MAVEN_IMAGE argument can be overwritten
+# but this is generally not needed.
+ARG MAVEN_IMAGE=maven:3.5-jdk-8
+
+#
+# Build phase: Use the maven image for building.
+#
+FROM ${MAVEN_IMAGE} as maven
+RUN adduser ij
+COPY . /src
+RUN chown -R ij /src
+USER ij
+WORKDIR /src
+RUN bin/populate-app.sh
+
+#
+# Install phase: Copy the build ImageJ.app into a
+# clean container to minimize size.
+#
+FROM ${IMAGE}
+COPY --from=maven /src/ImageJ.app /ImageJ.app
+ENV PATH $PATH:/ImageJ.app
+ENTRYPOINT ["ImageJ-linux64"]