Add Gerrit behind reverse-proxy
diff --git a/gerrit/Dockerfile b/gerrit/Dockerfile
new file mode 100644
index 0000000..161f286
--- /dev/null
+++ b/gerrit/Dockerfile
@@ -0,0 +1,25 @@
+FROM gerritcodereview/gerrit:3.8.0
+
+COPY --from=sourcearcade-nginx /etc/ssl/certs/sa-selfsigned.crt /var/gerrit/etc/
+RUN \
+ keytool -importcert -alias sa-selfsigned -file /var/gerrit/etc/sa-selfsigned.crt \
+ -keystore /var/gerrit/truststore -storepass uiaeuiae -noprompt && \
+ rm /var/gerrit/etc/sa-selfsigned.crt
+RUN \
+ echo | keytool -importkeystore \
+ -srckeystore /usr/lib/jvm/java-*/lib/security/cacerts \
+ -destkeystore /var/gerrit/truststore \
+ -deststorepass uiaeuiae -noprompt
+
+USER root
+RUN \
+ printf 'JAVA_OPTIONS="%s %s"\n' \
+ -Djavax.net.ssl.trustStore=/var/gerrit/truststore \
+ -Djavax.net.ssl.trustStorePassword=uiaeuiae >>/etc/default/gerritcodereview
+
+COPY gerrit/Dockerfile.entrypoint /privileged.sh
+RUN chmod 544 /privileged.sh
+COPY gerrit/Dockerfile.entrypoint-unprivileged /unprivileged.sh
+RUN chmod 555 /unprivileged.sh
+
+ENTRYPOINT ["/bin/sh", "/privileged.sh"]
diff --git a/gerrit/Dockerfile.entrypoint b/gerrit/Dockerfile.entrypoint
new file mode 100644
index 0000000..6aa141b
--- /dev/null
+++ b/gerrit/Dockerfile.entrypoint
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+set -e
+
+# Allows us to bind mount arbitrary owned files
+chown -R gerrit:gerrit /var/gerrit/{logs,etc,db,git,index,cache}/
+
+# Drop privileges as we set `USER root` only to change file permissions
+exec setpriv --reuid=gerrit --regid=gerrit --init-groups --inh-caps=-all /unprivileged.sh "$@"
diff --git a/gerrit/Dockerfile.entrypoint-unprivileged b/gerrit/Dockerfile.entrypoint-unprivileged
new file mode 100644
index 0000000..78ca1f8
--- /dev/null
+++ b/gerrit/Dockerfile.entrypoint-unprivileged
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -e
+
+exec /entrypoint.sh "$@"
diff --git a/gerrit/environment.template b/gerrit/environment.template
new file mode 100644
index 0000000..f8975aa
--- /dev/null
+++ b/gerrit/environment.template
@@ -0,0 +1,2 @@
+# Set to publicly visible Gerrit URL
+# CANONICAL_WEB_URL=https://review.some.host/