Simplistic testing of the Docker image

This simply uses the same LXC system that was just tested.
It's functional, but minimal.

.travis.yml

@@ -4,6 +4,9 @@ python: "2.7"
 sudo: required
 dist: trusty
 
+services:
+  - docker
+
 matrix:
   fast_finish: true
 
@@ -33,6 +36,9 @@ env:
   - LXC_NAME=ubuntu1604 LXC_DISTRO=ubuntu LXC_RELEASE=xenial
   - LXC_NAME=ubuntu1710 LXC_DISTRO=ubuntu LXC_RELEASE=artful
 
+before_install:
+  - docker build -t travis/algo .
+
 install:
   - sudo tar xf $HOME/lxc/cache.tar -C / || echo "Didn't extract cache."
   - export LXC_ROOTFS=/var/lib/lxc/$LXC_NAME/rootfs
@@ -41,18 +47,21 @@ install:
   - export LXC_IP="$(sudo lxc-info -Hin $LXC_NAME)"
   - sudo /bin/bash -c "printf '\n$LXC_IP test.lxc\n' >> /etc/hosts"
   - ssh-keygen -f ~/.ssh/id_rsa -t rsa -N ''
+  - chmod 0644 ~/.ssh/config
   - sudo mkdir -vm 0700 $LXC_ROOTFS/root/.ssh/
   - sudo cp -v ~/.ssh/id_rsa.pub $LXC_ROOTFS/root/.ssh/authorized_keys
   - sudo apt-get install build-essential libssl-dev libffi-dev python-dev && sudo pip install -r requirements.txt
   - pip install ansible-lint
   - gem install awesome_bot
+  - export DEPLOY_ARGS="server_ip=$LXC_IP server_user=root IP_subject_alt_name=$LXC_IP local_dns=Y"
 
 script:
   # - awesome_bot --allow-dupe --skip-save-results *.md docs/*.md --white-list paypal.com,do.co,microsoft.com,https://github.com/trailofbits/algo/archive/master.zip,https://github.com/trailofbits/algo/issues/new
 #  - shellcheck algo
 #  - ansible-lint deploy.yml users.yml deploy_client.yml
   - ansible-playbook deploy.yml --syntax-check
-  - ansible-playbook deploy.yml -t local,vpn,dns,ssh_tunneling,tests -e "server_ip=$LXC_IP server_user=root IP_subject_alt_name=$LXC_IP local_dns=Y"
+  - ansible-playbook deploy.yml -t local,vpn,dns,ssh_tunneling,tests -e "${DEPLOY_ARGS}"
+  - docker run -it -v $(pwd)/config.cfg:/algo/config.cfg -v ~/.ssh:/root/.ssh -e "DEPLOY_ARGS=${DEPLOY_ARGS}" travis/algo /bin/sh -c "chown -R 0:0 /root/.ssh && ls -l /root/.ssh && source env/bin/activate && ansible-playbook deploy.yml -t local,vpn,dns,ssh_tunneling,security,tests -e \"${DEPLOY_ARGS}\""
 
 after_script:
   - ./tests/update-users.sh