Add Dockerfiles for test and prod

docker/tester/Dockerfile

@@ -0,0 +1,32 @@
+FROM atat-app-builder-builder:latest as app-builder
+
+ARG APP_USER=atst
+ARG APP_GROUP=atat
+ARG APP_DIR=/opt/atat/atst
+ARG CIBUILD=true
+
+ENV SKIP_PIPENV true
+
+# Create application directory
+RUN set -x ; \
+  mkdir -p ${APP_DIR}
+
+# Set working dir
+WORKDIR ${APP_DIR}
+
+# Copy app and module files
+COPY . .
+
+# Add required system packages and app user
+RUN set -x ; \
+  script/alpine_setup "${APP_USER}" "${APP_GROUP}"
+
+# Install app dependencies
+RUN set -x ; \
+  script/setup
+
+# Use dumb-init for proper signal handling
+ENTRYPOINT ["/usr/bin/dumb-init", "--"]
+
+# Default command is to run all the tests
+CMD ["${APP_DIR}/script/cibuild"]