faster docker build

.dockerignore

@@ -1,7 +1,9 @@
-build
 .vscode
 .github
 .dev-tools
 tmp
 .gitignore
 .golangci.yml
+cmd
+go.mod
+go.sum

dev-tools/Taskfile.yaml

@@ -20,13 +20,17 @@ tasks:
   # Docker
   ####
   docker-build:
+    deps: [build]
     cmds:
       - cd .. && docker build -t go-sample-app:latest -f dev-tools/docker/Dockerfile .
 
   docker-inspect:
     cmds:
       - dive go-sample-app:latest
 
+  docker-run:
+    cmds: 
+      - docker run -it go-sample-app:latest
 
   ####
   # Asciinema
@@ -58,7 +62,7 @@ tasks:
   ####
   build:
     cmds:
-      - go build -v -tags=go_json -o ../build/hello ../cmd/hello.go
+      - GOOS=linux GOARCH=amd64 go build -v -tags=go_json -o ../build/hello ../cmd/hello.go
 
   run:  
     cmds: 

dev-tools/docker/Dockerfile

@@ -1,14 +1,4 @@
-FROM golang:1.19-bullseye as build
-
-WORKDIR /go/src/app
-ADD . /go/src/app/
-
-RUN go get -d -v ./...
-RUN go build -o /go/bin/app cmd/hello.go
-
-###
-
 FROM gcr.io/distroless/base-debian11
 
-COPY --from=build /go/bin/app /
+COPY build/hello /app
 CMD ["/app"]