chore(build): create dockerfile for release deployment

Signed-off-by: SphericalKat <amolele@gmail.com>

.dockerignore

@@ -0,0 +1,35 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where 3rd-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+ketbin-*.tar
+
+# If NPM crashes, it generates a log, let's ignore it too.
+npm-debug.log
+
+# The directory NPM downloads your dependencies sources to.
+/assets/node_modules/
+
+# Since we are building assets from assets/,
+# we ignore priv/static. You may want to comment
+# this depending on your deployment strategy.
+/priv/static/
+.idea

.gitignore

@@ -33,3 +33,4 @@ npm-debug.log
 # this depending on your deployment strategy.
 /priv/static/
 .idea
+.env

Dockerfile

@@ -0,0 +1,50 @@
+FROM elixir:alpine AS build
+
+# install build dependencies
+RUN apk add --no-cache build-base npm git curl py-pip
+
+# prepare build dir
+WORKDIR /app
+
+# install hex + rebar
+RUN mix local.hex --force && \
+    mix local.rebar --force
+
+# set build ENV
+ENV MIX_ENV=prod
+
+# install mix dependencies
+COPY mix.exs mix.lock ./
+COPY config config
+RUN mix do deps.get, deps.compile
+
+# build assets
+COPY assets/package.json assets/package-lock.json ./assets/
+RUN npm --prefix ./assets ci --progress=false --no-audit --loglevel=error
+
+COPY priv priv
+COPY assets assets
+RUN npm run --prefix ./assets deploy
+RUN mix phx.digest
+
+# compile and build release
+COPY lib lib
+# uncomment COPY if rel/ exists
+# COPY rel rel
+RUN mix do compile, release
+
+# prepare release image
+FROM alpine:3.9 AS app
+RUN apk add --no-cache openssl ncurses-libs libstdc++
+
+WORKDIR /app
+
+RUN chown nobody:nobody /app
+
+USER nobody:nobody
+
+COPY --from=build --chown=nobody:nobody /app/_build/prod/rel/ketbin ./
+
+ENV HOME=/app
+
+CMD ["bin/ketbin", "start"]

config/prod.exs

@@ -52,4 +52,4 @@ config :logger, level: :info
 
 # Finally import the config/prod.secret.exs which loads secrets
 # and configuration from environment variables.
-import_config "prod.secret.exs"
+# import_config "prod.secret.exs"

config/releases.exs

@@ -2,7 +2,7 @@
 # from environment variables. You can also hardcode secrets,
 # although such is generally not recommended and you have to
 # remember to add this file to your .gitignore.
-use Mix.Config
+import Config
 
 database_url =
   System.get_env("DATABASE_URL") ||
@@ -35,7 +35,7 @@ config :ketbin, KetbinWeb.Endpoint,
 # If you are doing OTP releases, you need to instruct Phoenix
 # to start each relevant endpoint:
 #
-#     config :ketbin, KetbinWeb.Endpoint, server: true
+config :ketbin, KetbinWeb.Endpoint, server: true
 #
 # Then you can assemble a release by calling `mix release`.
 # See `mix help release` for more information.