Start sketching out docker file

Needed for: ooni/sysadmin#164

Dockerfile

@@ -0,0 +1,29 @@
+# XXX we may want in the future to use a more minimal base image
+FROM debian:jessie
+
+ENV OONIBACKEND_VERSION '1.3.4'
+
+# Add Tor PGP key
+RUN set -x \
+    && gpg --keyserver pool.sks-keyservers.net --recv A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 \
+    && gpg --export A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 | apt-key add - \
+    && echo "deb http://deb.torproject.org/torproject.org jessie main" \
+         | tee /etc/apt/sources.list.d/tor.list
+
+# Install tor and required dependencies
+RUN set -x \
+    && apt-get -y update \
+    && apt-get install -y git-core python-pip python-dev libsqlite3-dev \
+                       libffi-dev tor deb.torproject.org-keyring libdumbnet-dev
+
+# Upgrade pip and setuptools to modern versions
+RUN set -x \
+    && pip install -U pip setuptools
+
+RUN set -x \
+    && mkdir /app
+
+COPY ./dist/oonibackend-$OONIBACKEND_VERSION.tar.gz /tmp/
+
+RUN set -x \
+    && pip /tmp/oonibackend-$OONIBACKEND_VERSION.tar.gz