Add container usage

Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:alpine AS builder
+WORKDIR /app
+ADD . /app
+RUN apk update && apk add build-base
+RUN cd /app && GOARGS="-buildmode=pie" CGO_ENABLED=0 make orion -B
+
+FROM scratch
+WORKDIR /data
+COPY --from=builder /app/orion /bin/orion
+ENTRYPOINT ["/bin/orion", "-config", "/conf/orion.conf"]
+VOLUME ["/conf"]
+VOLUME ["/data"]

Makefile

@@ -8,3 +8,9 @@ orion: cmd/orion/orion.go cmd/orion/gemini.go cmd/orion/config.go
 cert:
 	openssl genrsa -out orion.key 2048
 	openssl req -x509 -nodes -days 3650 -key orion.key -out orion.crt
+
+# Container recipies
+docker:
+	docker build . -t feldspaten.org/orion
+podman:
+	podman build . -t feldspaten.org/orion

README.md

@@ -20,6 +20,25 @@ To create self-signed certificates for quick testing, you can use the following
 
     make cert
 
+### podman/docker container
+
+`orion` is able to launch from a podman/docker container, however you need to first build the container yourself.
+
+    make podman         # Build container for podman
+    make docker         # Build container for docker
+
+The container expects the `/conf` volume to contain your configuration file `orion.conf` and suggests to place your date into the `/data` volume. If you want to use the later depends on your configuration in `orion.conf`.
+
+After building and configuration, this is how you can run your container:
+
+    # Replace `podman` with `docker` for a docker container
+    podman run --rm -ti --name orion -v /srv/orion/conf:/conf -v /srv/orion/data/:/data -p 1965 feldspaten.org/orion
+
+It's recommended to place your certificates in the `/conf` direcory and use the following configuration
+
+    Certfile = /conf/orion.crt
+    Keyfile = /conf/orion.key
+
 ## Credits
 
 * This project was inspired by the [titan2](https://gitlab.com/lostleonardo/titan2) minimalistic Gemini server written by lostleonardo.