ci: Dockerfile + docker-compose

.dockerignore

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+.git
+/bin/
+/.shards/
+/bruno/
+/spec/
+/sqlite/

Dockerfile

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+FROM alpine:edge as base
+WORKDIR /usr/src/app
+
+RUN apk add crystal shards sqlite-dev openssl-dev
+
+FROM base AS build
+ENV ENV=production
+COPY . . 
+
+RUN shards install
+RUN shards build --progress
+
+FROM base AS release
+COPY --from=build /usr/src/app/bin/migrate .
+COPY --from=build /usr/src/app/bin/url-shortener .
+COPY --from=build /usr/src/app/bin/cli .
+
+EXPOSE 4000/tcp
+CMD ["./url-shortener"]

docker-compose.yml

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+services:
+  app:
+    build: .
+    environment:
+      ENV: production
+      DATABASE_URL: sqlite3://./sqlite/data.db?journal_mode=wal&synchronous=normal&foreign_keys=true
+      APP_URL: http://0.0.0.0:4001
+    ports:
+      - 4001:4001