Move docker files and update travis.yml accordingly

deploy/docker/tester/Dockerfile

@@ -0,0 +1,40 @@
+FROM registry.atat.codes:443/atat-app-builder:latest
+
+### Very low chance of changing
+###############################
+ARG APP_USER=atst
+ARG APP_GROUP=atat
+ARG APP_DIR=/opt/atat/atst
+ARG CIBUILD=true
+
+ENV APP_DIR "${APP_DIR}"
+ENV SKIP_PIPENV true
+
+# Use dumb-init for proper signal handling
+ENTRYPOINT ["/usr/bin/dumb-init", "--"]
+
+# Default command is to run all the tests
+CMD ["bash", "-c", "${APP_DIR}/script/cibuild"]
+
+# Create application directory
+RUN set -x ; \
+  mkdir -p ${APP_DIR}
+
+# Set working dir
+WORKDIR ${APP_DIR}
+
+# Copy over alpine setup script
+COPY script/alpine_setup ./script/
+
+# Add required system packages and app user
+RUN set -x ; \
+  script/alpine_setup "${APP_USER}" "${APP_GROUP}"
+
+### Items that will change almost every build
+#############################################
+# Copy over the rest of the app source
+COPY . .
+
+# Install app dependencies
+RUN set -x ; \
+  script/setup