main: api dockerfile, makefile and docker-compose (stellar#22)

What
Adds the Dockerfile for building the API's Docker image. A Makefile is also added to make the CI/CD later easier.
The docker-compose is also changed to use the new Dockerfile and run the API more easily.

Why
Building the system's Docker image.

Author: daniel-burghardt

Dockerfile

@@ -0,0 +1,22 @@
+# To build:
+#    make docker-build
+# To push:
+#    make docker-push
+
+FROM golang:1.22.4-bullseye as build
+ARG GIT_COMMIT
+
+WORKDIR /src/wallet-backend
+ADD go.mod go.sum ./
+RUN go mod download
+ADD . ./
+RUN go build -o /bin/wallet-backend -ldflags "-X main.GitCommit=$GIT_COMMIT" .
+
+
+FROM ubuntu:22.04
+
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates
+COPY --from=build /bin/wallet-backend /app/
+EXPOSE 8001
+WORKDIR /app
+ENTRYPOINT ["./wallet-backend"]

Makefile

@@ -0,0 +1,17 @@
+# Check if we need to prepend docker command with sudo
+SUDO := $(shell docker version >/dev/null 2>&1 || echo "sudo")
+
+LABEL ?= $(shell git rev-parse --short HEAD)$(and $(shell git status -s),-dirty-$(shell id -u -n))
+# If TAG is not provided set default value
+TAG ?= stellar/wallet-backend:$(LABEL)
+# https://github.com/opencontainers/image-spec/blob/master/annotations.md
+BUILD_DATE := $(shell date -u +%FT%TZ)
+
+docker-build:
+	$(SUDO) docker build -f Dockerfile --pull --label org.opencontainers.image.created="$(BUILD_DATE)" -t $(TAG) --build-arg GIT_COMMIT=$(LABEL) .
+
+docker-push:
+	$(SUDO) docker push $(TAG)
+
+go-install:
+	go install -ldflags "-X main.GitCommit=$(LABEL)" .

cmd/serve.go

@@ -24,15 +24,15 @@ func (c *serveCmd) Command() *cobra.Command {
 			Usage:       "Port to listen and serve on",
 			OptType:     types.Int,
 			ConfigKey:   &cfg.Port,
-			FlagDefault: 8000,
+			FlagDefault: 8001,
 			Required:    false,
 		},
 		{
 			Name:        "server-base-url",
 			Usage:       "The server base URL",
 			OptType:     types.String,
 			ConfigKey:   &cfg.ServerBaseURL,
-			FlagDefault: "http://localhost:8000",
+			FlagDefault: "http://localhost:8001",
 			Required:    true,
 		},
 		{

docker-compose.yaml

@@ -1,4 +1,3 @@
-version: '3.8'
 services:
   db:
     image: postgres:12-alpine
@@ -9,6 +8,27 @@ services:
       - postgres-db:/var/lib/postgresql/data
     ports:
       - 5432:5432
+  api:
+    image: stellar/wallet-backend:development
+    build: ./
+    depends_on:
+      db:
+        condition: service_started
+    ports:
+      - 8001:8001
+    entrypoint: ""
+    command:
+      - sh
+      - -c
+      - |
+        ./wallet-backend migrate up
+        ./wallet-backend serve
+    environment:
+      DATABASE_URL: postgres://postgres@db:5432/wallet-backend?sslmode=disable
+      PORT: 8001
+      SERVER_BASE_URL: http://localhost:8001
+      LOG_LEVEL: TRACE
+      WALLET_SIGNING_KEY: GAXBXPBZNJG6PQBE7M3VTEZ4EIRVDL4TSTQEVHEOYOLMYQZWJ4WUA4YF
 
 volumes:
   postgres-db:

main.go

@@ -1,6 +1,12 @@
 package main
 
-import "github.com/stellar/wallet-backend/cmd"
+import (
+	"github.com/stellar/wallet-backend/cmd"
+)
+
+// GitCommit is populated at build time by
+// go build -ldflags "-X main.GitCommit=$GIT_COMMIT"
+var GitCommit string
 
 func main() {
 	cmd.Execute()