Add a docker image for armv7hf.

docker/armv7hf/Dockerfile

@@ -0,0 +1,33 @@
+FROM openstf/armv7hf-base:v1.0.1
+
+# Add a user for the app.
+RUN useradd --system \
+      --no-create-home \
+      --shell /usr/sbin/nologin \
+      --home-dir /app \
+      stf
+
+# Sneak the stf executable into $PATH.
+ENV PATH /app/bin:$PATH
+
+# Work in app dir by default.
+WORKDIR /app
+
+# Export default app port, not enough for all processes but it should do
+# for now.
+EXPOSE 3000
+
+# Copy app source.
+COPY . /app/
+
+# Get the rest of the dependencies and build.
+RUN export PATH=/app/node_modules/.bin:$PATH && \
+    npm install && \
+    bower install --allow-root && \
+    gulp build
+
+# Switch to weak user.
+USER stf
+
+# Show help by default.
+CMD stf --help