n8n: create basic Dockerfile

The one on the Docker hub doesn't like our setup very much

README.md

@@ -94,11 +94,12 @@ UID     | GID	| Container				| Notes
 10200	| 10200	| archivebox			| 
 10300   | 10300 | tinyproxy             | 
 10400	| 10400	| json2collectdmqtt		| `chown` environment file to `10400:10400`, as it's loaded by a startup shell script inside the container
+10500	| 10500	| n8n					| 
 
 <!--
 Container from the main public Docker registry:
 
-n8n: 11100
+(none documented yet, though we do use one for music.mooncarrot.space)
 
 Note that user ids for these are set in the Nomad job spec file, and not in the Dockerfile for the container itself.
 -->

images/n8n/Dockerfile

@@ -0,0 +1,13 @@
+ARG REPO_LOCATION
+
+FROM ${REPO_LOCATION}minideb-node
+
+RUN npm install -g n8n
+
+USER 10500:10500
+
+VOLUME /srv
+# Tell n8n to store stuff in /srv
+ENV HOME=/srv
+
+ENTRYPOINT [ "/usr/local/bin/n8n" ]

images/n8n/type.txt

@@ -0,0 +1 @@
+docker