Build Docker image (#8)

* Build Docker image

* Run CI build

* Remove line for debugging

* Remove debugging for Docker image

* Remove static folder from Docker image

Author: mtlynch

.circleci/config.yml

@@ -74,12 +74,84 @@ jobs:
           root: ./
           paths:
             - ./bin/screenjournal
+  build_docker_images:
+    docker:
+      - image: cimg/base:stable
+    environment:
+      BUILD_TARGETS: "linux/arm/v7,linux/arm64,linux/amd64"
+    steps:
+      - checkout
+      - setup_remote_docker:
+          version: 20.10.11
+      - run:
+          name: Log in to Docker Hub
+          command: |
+            echo "${DOCKERHUB_ACCESS_TOKEN}" | \
+              docker login --username "${DOCKERHUB_USERNAME}" --password-stdin
+      - run:
+          name: Enable multiarch builds with QEMU
+          command: |
+            docker run \
+              --rm \
+              --privileged \
+              multiarch/qemu-user-static \
+              --reset \
+              -p yes
+      - run:
+          name: Create multiarch build context
+          command: docker context create builder
+      - run:
+          name: Create multiplatform builder
+          command: |
+            docker buildx create builder \
+              --name builder \
+              --driver docker-container \
+              --use
+      - run:
+          name: Ensure builder has booted
+          command: docker buildx inspect --bootstrap
+      - run:
+          name: Build docker images
+          command: |
+            docker buildx build \
+              --push \
+              --platform "$BUILD_TARGETS" \
+              --tag "mtlynch/screenjournal:${CIRCLE_TAG}" \
+              --tag mtlynch/screenjournal:latest \
+              .
 workflows:
   version: 2
   test_deploy:
     jobs:
-      - check_whitespace
-      - check_bash
-      - check_frontend
-      - test_go
-      - build_backend
+      - check_whitespace:
+          filters:
+            tags:
+              only: /.*/
+      - check_bash:
+          filters:
+            tags:
+              only: /.*/
+      - check_frontend:
+          filters:
+            tags:
+              only: /.*/
+      - test_go:
+          filters:
+            tags:
+              only: /.*/
+      - build_backend:
+          filters:
+            tags:
+              only: /.*/
+      - build_docker_images:
+          requires:
+            - check_whitespace
+            - check_bash
+            - check_frontend
+            - test_go
+            - build_backend
+          filters:
+            tags:
+              only: /[0-9]+(\.[0-9]+){2}/
+            branches:
+              ignore: /.*/

Dockerfile

@@ -0,0 +1,38 @@
+FROM golang:1.19.1 AS builder
+
+ARG TARGETPLATFORM
+
+COPY ./cmd /app/cmd
+COPY ./handlers /app/handlers
+COPY ./go.* /app/
+
+WORKDIR /app
+
+RUN set -x && \
+    if [ "$TARGETPLATFORM" = "linux/arm/v7" ]; then \
+      GOARCH="arm"; \
+    elif [ "$TARGETPLATFORM" = "linux/arm64" ]; then \
+      GOARCH="arm64"; \
+    else \
+      GOARCH="amd64"; \
+    fi && \
+    set -u && \
+    GOOS=linux \
+    go build \
+      -tags netgo \
+      -ldflags '-w -extldflags "-static"' \
+      -o /app/screenjournal \
+      cmd/screenjournal/main.go
+
+FROM alpine:3.15
+
+RUN apk add --no-cache bash
+
+COPY --from=builder /app/screenjournal /app/screenjournal
+COPY ./docker-entrypoint /app/docker-entrypoint
+COPY ./static /app/static
+COPY ./LICENSE /app/LICENSE
+
+WORKDIR /app
+
+ENTRYPOINT ["/app/docker-entrypoint"]

dev-scripts/serve-docker

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Exit build script on first failure.
+set -e
+
+# Echo commands to stdout.
+set -x
+
+# Exit on unset variable.
+set -u
+
+# Change directory to repository root.
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+readonly SCRIPT_DIR
+cd "${SCRIPT_DIR}/.."
+
+DOCKER_BUILDKIT=1 \
+  docker build -t screenjournal .
+
+docker rm -f screenjournal || true
+
+docker run \
+  --env "PORT=4002" \
+  --publish "0.0.0.0:4002:4002" \
+  --name screenjournal \
+  screenjournal

docker-entrypoint

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Exit build script on first failure.
+set -e
+
+# Exit on unset variable.
+set -u
+
+SJ_ARGS="$*"
+readonly SJ_ARGS
+
+# Echo commands to stdout.
+set -x
+
+SJ_LAUNCH_CMD="/app/screenjournal ${SJ_ARGS}"
+
+eval "${SJ_LAUNCH_CMD}"