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+# This dockerfile builds on top of 'docker/Dockerfile-worker' in matrix-org/synapse
+# by including a built-in postgres instance, as well as setting up the homeserver so
+# that it is ready for testing via Complement.
+#
+# Instructions for building this image from those it depends on is detailed in this guide:
+# https://github.com/matrix-org/synapse/blob/develop/docker/README-testing.md#testing-with-postgresql-and-single-or-multi-process-synapse
+FROM matrixdotorg/synapse-workers
+
+# Download a caddy server to stand in front of nginx and terminate TLS using Complement's
+# custom CA.
+# We include this near the top of the file in order to cache the result.
+RUN curl -OL "https://github.com/caddyserver/caddy/releases/download/v2.3.0/caddy_2.3.0_linux_amd64.tar.gz" && \
+  tar xzf caddy_2.3.0_linux_amd64.tar.gz && rm caddy_2.3.0_linux_amd64.tar.gz && mv caddy /root
+
+# Install postgresql
+RUN apt-get update
+RUN apt-get install -y postgresql
+
+# Configure a user and create a database for Synapse
+RUN pg_ctlcluster 13 main start &&  su postgres -c "echo \
+ \"ALTER USER postgres PASSWORD 'somesecret'; \
+ CREATE DATABASE synapse \
+  ENCODING 'UTF8' \
+  LC_COLLATE='C' \
+  LC_CTYPE='C' \
+  template=template0;\" | psql" && pg_ctlcluster 13 main stop
+
+# Modify the shared homeserver config with postgres support, certificate setup
+# and the disabling of rate-limiting
+COPY conf-workers/workers-shared.yaml /conf/workers/shared.yaml
+
+WORKDIR /data
+
+# Copy the caddy config
+COPY conf-workers/caddy.complement.json /root/caddy.json
+
+# Expose caddy's listener ports
+EXPOSE 8008 8448
+
+ENTRYPOINT \
+  # Replace the server name in the caddy config
+  sed -i "s/{{ server_name }}/${SERVER_NAME}/g" /root/caddy.json && \
+  # Start postgres
+  pg_ctlcluster 13 main start 2>&1 && \
+  # Start caddy
+  /root/caddy start --config /root/caddy.json 2>&1 && \
+  # Set the server name of the homeserver
+  SYNAPSE_SERVER_NAME=${SERVER_NAME} \
+  # No need to report stats here
+  SYNAPSE_REPORT_STATS=no \
+  # Set postgres authentication details which will be placed in the homeserver config file
+  POSTGRES_PASSWORD=somesecret POSTGRES_USER=postgres POSTGRES_HOST=localhost \
+  # Specify the workers to test with
+  SYNAPSE_WORKER_TYPES="\
+    event_persister, \
+    event_persister, \
+    background_worker, \
+    frontend_proxy, \
+    event_creator, \
+    user_dir, \
+    media_repository, \
+    federation_inbound, \
+    federation_reader, \
+    federation_sender, \
+    synchrotron, \
+    appservice, \
+    pusher" \
+  # Run the script that writes the necessary config files and starts supervisord, which in turn
+  # starts everything else
+  /configure_workers_and_start.py
+
+HEALTHCHECK --start-period=5s --interval=1s --timeout=1s \
+    CMD /bin/sh /healthcheck.sh