Add docker file

Author: eiri

.dockerignore

@@ -0,0 +1,3 @@
+_build
+.github
+integration

Dockerfile

@@ -0,0 +1,23 @@
+FROM erlang:alpine AS builder
+
+RUN apk add --no-cache git
+
+RUN mkdir /build
+WORKDIR /build
+
+COPY . seppen
+
+WORKDIR seppen
+RUN rebar3 as prod release
+
+FROM alpine
+
+RUN apk add --no-cache openssl && \
+    apk add --no-cache ncurses-libs && \
+    apk add --no-cache libstdc++
+
+COPY --from=builder /build/seppen/_build/prod/rel/seppen /seppen
+
+EXPOSE 21285
+
+CMD ["/seppen/bin/seppen", "foreground"]

Makefile

@@ -1,5 +1,6 @@
 .DEFAULT_GOAL := all
 
+DOCKER_USER := starcrust
 PROJECT := seppen
 
 NODE := [email protected]
@@ -47,6 +48,10 @@ release:
 run: release
 	$(CURDIR)/_build/default/rel/seppen/bin/seppen foreground
 
+.PHONY: docker
+docker:
+	docker build -t $(DOCKER_USER)/$(PROJECT) .
+
 .PHONY: shell
 shell:
 	rebar3 shell --name $(NODE) --setcookie $(COOKIE) --apps=$(PROJECT)

rebar.config

@@ -17,7 +17,7 @@
     {vm_args_src, "config/vm.args.src"},
     {sys_config, "config/dev/sys.config"},
     {overlay, [
-        {copy, ".hosts.erlang", ".hosts.erlang"}
+        {copy, "config/dev/.hosts.erlang", ".hosts.erlang"}
     ]},
     {extended_start_script, true}
 ]}.
@@ -27,7 +27,8 @@
         %% [{include_src, false}, {debug_info, strip}, {include_erts, true}, {dev_mode, false}]
         {relx, [
             {mode, prod},
-            {sys_config, "config/prod/sys.config"}
+            {sys_config, "config/prod/sys.config"},
+            {overlay, []}
         ]}
     ]}
 ]}.