Add Containerfile

Containerfile

@@ -0,0 +1,14 @@
+FROM docker.io/alpine:3.19
+
+ENV MIX_ENV=prod
+
+RUN apk add --update --no-cache elixir
+
+WORKDIR /app
+
+COPY . /app
+
+RUN mix deps.get
+RUN mix release
+
+CMD _build/prod/rel/matrix2051/bin/matrix2051 start

INSTALL.md

@@ -59,3 +59,21 @@ This does the following:
 * Create a temporary user to run the process as
 * Makes sure the process can't write any file on the system or gain new capabilities
   (implied by `DynamicUser=true`)
+
+# Running matrix2051 as a container
+
+Alternatively a Containerfile is provided as well for convenience. The
+image can be built with either [podman](https://podman.io/) or
+[docker](https://www.docker.com/).
+
+To build it:
+
+```
+podman build -t matrix2051 .
+```
+
+To run it:
+
+```
+podman run --publish 2051:2051 --interactive matrix2051
+```